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1977, 2019, 2028, 2054, 2146, 2362, 2443, 2459, 2533, 2621, 2655, 2750, 2763, 2854, 2958, 2976, 3021, 3039, 3082, 3378, 3429, 3448, 3535, 3597, 3624, 3640], 'close': [209, 367, 661, 721, 2593], 'speed': [212, 370, 1303, 1318, 1711, 1869, 1889, 2092, 2312, 2340, 2400, 2730, 3236], 'sound.': [214, 372], 'The': [215, 323, 373, 434, 480, 622, 729, 797, 823, 989, 1034, 1039, 1092, 1175, 1227, 1259, 1664, 1710, 1868, 1920, 1963, 2091, 2102, 2149, 2221, 2419, 2646, 2694, 2734, 3005, 3052, 3089, 3122, 3189, 3243, 3408, 3423, 3729, 3775, 3845, 3943, 3969], 'initial': [216, 740, 942, 1002, 3708], 'wave': [218, 243, 359, 557, 670, 830, 846, 1093, 1099, 1159, 1274, 1639, 1812, 1853, 1911, 1921, 1967, 2000, 2095, 2166, 2301, 2399, 2435, 2508, 2729, 2749, 3235], 'was': [219, 380, 1205, 1669, 1743, 2100, 2115, 2482, 3158, 3561], 'detected': [220, 246, 381, 2174, 2591, 3266], 'across': [221, 382, 964, 1750, 2167, 2206, 2317, 2401, 3042, 3145], 'entire': [223, 384], 'globe,': [224, 385], 'reaching': [225, 386, 1941, 2181], 'British': [227, 249, 388, 618, 623, 679, 966, 1046, 1755, 1926, 3048, 3087, 3395], 'Irish': [229, 251, 390, 620, 625, 681, 734, 968, 1048, 1757, 1928, 3050, 3397, 3628], 'Isles': [230, 252, 391, 621, 626, 682, 969, 1049, 3398], 'some': [231, 392, 1761, 1793, 1816, 2199, 3185], '14': [232, 393, 2200], 'hours': [233, 256, 394, 836, 899, 1173, 1958, 2201, 2215, 2614, 3117], 'after': [234, 257, 395, 1959, 2203, 2615, 3118], 'eruption.': [236, 397, 2617, 3121], 'Several': [237], 'reverberations': [239, 2638], 'could': [244, 2588], 'be': [245, 1836, 1862, 2039, 2349, 2383, 2494, 2590, 3413], 'up': [253, 3107, 3114], '127': [255, 2613], 'eruption,': [259], 'what': [261], 'appears': [262, 483, 2432], 'been': [265, 876, 1781, 1799, 3605], 'largest': [267, 3244, 3316], 'amplitude': [268, 1260, 1665, 2278, 2719, 2735, 2997, 3053, 3148], 'airwave': [269, 438, 1085, 1739, 3144], 'event': [270, 3163, 3181], 'caused': [271, 3676], 'distant': [274], 'natural': [275, 2981, 3318], 'phenomenon': [276], 'since': [277, 2868, 3325], 'Krakatoa': [279, 450, 481, 603, 3008, 3056, 3091, 3333, 3770, 3776, 3848, 3855], 'August': [282, 608, 3030], '1883.': [283, 3779, 3811, 3831], 'atmosphere': [314, 1906, 3324], '(US': [315], 'Geological': [316, 1785, 3903, 3916], 'Survey,': [317, 3904], '2022:': [318], 'NASA': [319, 3787], 'Earth': [320, 3788], 'Observatory,': [321, 2565], '2022).': [322, 433, 3723, 3806, 3912, 3937], 'is': [325, 477, 817, 1008, 1061, 1094, 1113, 1187, 1234, 1263, 1813, 1876, 1896, 2050, 2332, 2380, 2409, 2569, 3164], 'located': [326, 737], '20.546°N,': [328], '175.39°W': [329, 784], 'lies': [331, 2422], 'about': [332, 820, 834, 878, 1070, 1652, 1893, 1956, 2029, 2218, 2244, 2411, 3133, 3308], '68km': [333], 'north–northwest': [334], "Nuku'alofa,": [336], 'capital': [338, 943], 'city': [339], 'Kingdom': [342, 731], 'Tonga.': [344], 'its': [377, 751, 1246, 1914, 1973], 'reverberations,': [379], 'Its': [398], 'ripples': [400, 2442], 'are': [401, 736, 755, 762, 800, 931, 939, 1075, 1128, 1177, 1255, 1703, 1760, 1830, 2581, 2968, 3456], 'shown': [402, 920, 1009, 1056, 1188], 'nicely': [403], 'animation': [406, 540, 577, 2034], 'prepared': [407, 541, 568], 'infrared': [409, 571], 'satellite': [410, 572], 'data': [411, 922, 1068, 2702, 3454, 3487, 3623], 'appeared': [413, 2226], 'widely': [414], 'media': [417], 'days': [420], 'eruption;': [423], 'Figure': [424, 530, 580, 687, 743, 766, 885, 946, 948, 999, 1058, 1633, 1954, 2526, 2641], '1': [425, 1078, 3427], 'shows': [426, 689, 1635, 2073, 2528, 2713], 'two': [427, 1190, 2120, 3222], 'frames': [428, 536], 'sequence': [431], '(Barlow,': [432], 'resemblance': [435], 'patterns': [439, 2439], 'deduced': [440], 'Royal': [443, 3006, 3773, 3859, 3861], 'Society': [444], 'committee': [445], '1883': [452], '(Figure': [453, 645, 2070, 2088, 2191, 2262], '2,': [454], 'Symons,': [456, 524, 611], '1888)': [457, 3011, 3094], '–': [458, 476, 1279, 1284, 1684, 3067, 3403, 3488], 'almost': [459, 683, 2465, 3594], '140': [460], 'years': [461, 3187], 'ago,': [462], 'course': [465], 'long': [466], 'before': [467], 'modern': [468], 'satellites,': [469], 'digital': [470, 1066, 3509], 'records': [472, 892, 919, 996, 1019, 1219, 2234, 2557, 3402, 3447, 3511, 3534], 'computer': [474], 'models': [475], 'pleasingly': [478], 'apparent.': [479], 'numerous': [486, 2969, 3598], 'points': [487], 'common': [489], "Ha'apai,": [493], 'not': [494, 1770, 2348, 2454, 3280], 'that': [496, 1636, 2026, 2107, 3250, 3332, 3374], 'both': [497, 2471, 2980, 3339, 3430], 'were': [498, 1020, 2453, 2552, 3058, 3171, 3211, 3265, 3338, 3386], 'largely': [499], 'instantaneous': [500, 3351], 'extremely': [502], 'violent': [503, 3342], 'eruptions': [504], 'confined': [506, 3345], 'part-submerged': [508], 'calderas,': [510, 3348], 'resulting': [512, 2620, 2762, 3020, 3377], 'great': [513, 554, 636, 653, 1209, 1228, 1718, 1970, 3944], 'height': [514], 'atmospheric': [516, 2978, 3637, 3709], 'plumes': [517], "(Krakatoa's": [518], 'reached': [520, 877, 1171, 1972, 1992], '27–34km;': [523], '1888,': [525, 612], 'pp.': [526, 3865], '19,': [527], '379,': [528], '448).': [529], '1Open': [531], 'figure': [533, 583, 769, 888, 951, 2644], 'viewerPowerPoint': [534, 584, 770, 889, 952, 2645], 'Two': [535], 'extracted': [537], 'Matthew': [543], 'Barlow': [544, 3702], 'Massachusetts': [549], 'Lowell': [550], 'showing': [551, 2035, 2684], 'expanding': [553, 2010], 'circle': [555, 637, 654, 772, 1210, 1229, 1252, 1299, 1314, 1719, 1971], 'originating': [558], 'Tonga': [562, 3643, 3713, 3929], 'Pacific,': [567], 'GOES-West': [570], 'data.': [573], 'View': [574], 'complete': [576], 'https://github.com/mathewbarlow/animations/blob/main/tonga_wave_labeled.gif.': [579], '2Open': [581], 'Isochrones': [585], '2-h': [587], 'intervals,': [588], '38': [590], 'hours,': [591], 'first': [594, 1040, 1084, 1638, 2175, 2260, 2296, 2679], 'reflected': [596], 'cataclysmic': [600], '(6.1°S,': [604], '105.4°W)': [605], '27': [607, 3029], '1883;': [609], 'Plate': [613], 'X.': [614], 'Airwaves': [615], 'lie': [627], 'between': [628, 1050, 1729, 2424, 2440, 2821, 2925, 3823], '16': [629, 802, 824, 986, 1285, 1372, 1386, 1400, 1416, 1431, 1446, 1460, 1475, 1490, 1504, 1520, 1535, 1549, 1563, 1578, 1593, 1609, 1624], '000': [630, 807], '17': [632, 804, 854, 3483], '000km': [633, 825, 855, 860, 866], 'route': [638, 655], 'site': [641, 659, 1006, 1185, 1238, 1723, 1980, 2198, 2265], '3).': [646], 'Perhaps': [647], 'contrary': [648], 'expectation,': [650], 'shortest': [652], 'passes': [660], 'North': [664, 1602], 'Pole,': [665], 'thus': [667, 840, 2464, 3411], '‘outbound’': [669, 1041], '(hereafter,': [674], 'Wave': [675, 748, 753, 962, 983, 1037, 1042, 1232, 1243, 1302, 1317, 1878, 2005, 2077, 2113, 2134, 2152, 2156, 2224, 2230, 2289, 2358, 2367, 2417, 2444, 2449, 2791, 2855, 2892, 2959], 'I)': [676], 'crossed': [677, 1044], 'north': [684, 710, 789, 1689, 2171, 2363], 'south.': [686], '4': [688, 1000, 1634, 2089], '1-min': [690, 1064, 1217, 3516, 3590], 'detrended': [691, 906], 'observations': [693, 3424, 3592], '12-hour': [696], 'period': [697, 1266, 2250, 2540, 2663, 2787], 'commencing': [698, 900], '1600': [699, 901], 'selection': [706, 1027, 1088, 1147, 2323], 'sites': [708, 735, 895, 994, 1072, 1149, 1176, 1215, 1752, 2320, 3041, 3223, 3596], '(Lerwick)': [711], '(Jersey),': [714], 'Tamanrasset': [717, 929, 2055, 2099, 2103, 3557, 3569], 'Algeria': [719, 816, 2058], 'very': [720, 1114, 1661, 2121, 2993, 3068, 3340], 'point': [724, 813, 873, 1170, 1248, 1945, 2069], 'antipodal': [725, 1169, 1247, 1944, 1988, 1997, 2068], 'volcano.': [728], 'United': [730], '(UK)': [732], 'their': [739, 2474, 3449], 'letter': [741, 944, 1003], '5(a).': [744, 947], 'Both': [745], 'outbound': [747, 2133], 'I': [749, 963, 1038, 1043, 1142, 1233, 1278, 2078, 2114, 2231, 2368, 2445, 2793], '‘rebound’': [752, 2037, 2155], 'IA': [754, 984, 1144, 1244, 1283, 2153, 2157, 2225, 2290, 2359, 2794], 'clearly': [756, 2582], 'evident': [757, 2239, 2553], 'plot': [760, 2696], 'discussed': [763, 1129, 3012], 'further': [764, 2635], 'below.': [765], '3Open': [767], 'Great': [771, 1251], 'distances,': [773], 'kilometres,': [775], '20.55°S,': [783], 'northwest': [786], 'Europe': [787, 3214, 3822], 'Africa,': [790], 'plotted': [791, 997], 'Mercator': [794], 'projection': [795], 'map.': [796], 'range': [798, 826], 'rings': [799], '000,': [803, 805], '18': [806, 859, 1172, 1957, 3205, 3751], '19': [809, 865, 2548, 2671], '000km;': [810], 'antipodean': [812, 872], 'southern': [815, 2057, 3302], 'indicated': [818], '20': [821, 2608, 3186], '000km.': [822], 'ring': [827], 'represents': [828], 'travel': [831], 'time': [832, 1163, 1293, 1296, 1308, 1311, 1727, 1734, 1776, 1794, 1807, 2285, 2293, 2377, 2715, 2834, 2867, 2938], '14.1': [835], '315ms−1,': [838], 'likely': [842, 1834], 'position': [843], 'front': [847], 'approximately': [849], '1820': [850], 'utc.': [851, 880, 2031, 2148], 'Similarly': [852], '(approximately': [856, 861, 867], '1920': [857], 'utc),': [858, 869], '2010': [862], 'utc)': [863, 2805], '2105': [868], 'while': [870], 'would': [874, 1847, 2347], '2200–2205': [879], 'Map': [881], 'created': [882], 'GPSvisualizer.com.': [884], '4Open': [886], 'Plotted': [890], 'seven': [894], 'covering': [896], '12': [898, 2245], 'plotting': [908], '1min': [909, 1837], 'successive': [910], 'incremental': [911], 'differences.': [912], 'Units': [913, 2691], 'hPa.': [915, 2693], 'All': [916, 3667], 'resolution': [923, 936, 1065, 1222, 3517, 3620], '1min,': [924], 'all': [926, 2138, 2318], 'but': [927, 1200, 1767, 1788, 2992, 3226, 3277, 3502], 'record': [930, 2053, 2105, 2532, 2597, 2687], 'sensors': [933], 'sensor': [935, 1824], '<0.1hPa.': [937], 'Locations': [938], 'identified': [940, 3095], '5Open': [949], '(a)': [953], 'Time': [954, 975, 2801], 'passage': [956, 977, 1035, 2150, 2469, 2478, 2515, 2575, 2612, 2632, 2676], '‘outward’': [961], '2022.': [973, 988, 3666, 3704, 3718, 3790, 3918, 3932], '(b)': [974], '‘reflected’': [982], 'red': [990], 'circles': [991, 1014], 'show': [992, 1015], '(the': [1001], 'name': [1007], '(a));': [1011], 'black': [1013], 'additional': [1016], 'stations': [1017], 'whose': [1018, 1073, 3156], 'used': [1021, 1206, 3600], 'identify': [1023], 'arrival': [1024, 1275, 1599, 1736, 1809, 2075, 2097, 2109, 2287, 2379, 2431, 2717, 2803, 2836, 2940, 3234], 'times,': [1025], 'appear': [1030, 2326], 'Table': [1032, 1077, 1136, 2328, 2711, 2753, 3426], '1.': [1033, 1137], '1800': [1051], '1900': [1053, 1591], 'utc,': [1054, 1939, 2180], 'as': [1055, 1641, 1864, 1968, 1983, 2004, 2008, 2017, 2079, 2240, 2291, 2818, 2922, 3160, 3358, 3387, 3389, 3415, 3607], '5(a),': [1059], 'based': [1062], 'upon': [1063, 1986, 2096, 3173], '40': [1071, 3040], 'positions': [1074], 'indicated.': [1076], 'lists': [1079], 'characteristics': [1081], 'these': [1090, 1214, 1768, 1859], 'sites.': [1091], 'pressure-pulse': [1096], 'or': [1097, 1225, 1658, 1838, 2024, 2461, 2637], 'compression-type': [1098], '(longitudinal': [1100], 'wave)': [1101], 'acting': [1102], 'mostly': [1103, 1831], 'within': [1104, 1150, 1753, 2061, 2117, 2434, 2828, 2844, 2932, 2948, 3399], 'denser': [1106], 'lower': [1107, 2413], 'portion': [1108], 'atmosphere,': [1111], 'shallow': [1115], 'compared': [1116], 'radius': [1119], 'Earth;': [1122], 'form': [1124, 2222], 'such': [1126, 2963], 'waves': [1127, 2247, 2481, 2521, 2636, 2723, 2738, 2974, 3000, 3100, 3675, 3755, 3880], 'detail': [1132, 3014], 'Gabrielson': [1134, 3767], '(2010).': [1135], 'Arrival': [1138, 1292, 1295, 1307, 1310], 'times': [1139, 1829, 2756], 'Waves': [1141, 2577, 2584, 3109], 'Ireland,': [1153, 2238], '15/16': [1154], 'derived': [1158, 1880], 'speeds': [1160], 'assuming': [1161], 'January,': [1167, 2609], 'later.': [1174, 3188], 'arranged': [1178], 'descending': [1180], 'order': [1181], 'latitude.': [1183], 'Each': [1184, 1212, 2264], 'location': [1186], 'decimal': [1191], 'places': [1192, 1683], 'latitude': [1194], 'longitude': [1196], 'table,': [1199], 'where': [1201], 'available': [1202], 'greater': [1203, 1686, 2308], 'precision': [1204], 'calculate': [1208], 'distances.': [1211], 'has': [1216, 1780, 2707, 3604], '0.1hPa': [1224], 'better.': [1226], 'distance': [1230, 1253, 1300, 1315, 1720, 2746, 2880, 2906], '(20.55°S,': [1239], '175.39°W)': [1240], '(20.55°N,': [1249, 1946], '4.61°E).': [1250], 'calculations': [1254], 'calculated': [1256, 1715], 'using': [1257], 'www.gpsvisualizer.com/calculators.': [1258], '(in': [1261], 'hPa)': [1262], '60min': [1268, 2829, 2933], 'either': [1270, 2830, 2934], 'side': [1271, 2831, 2935], 'time.': [1276], 'WAVE': [1277, 1282], 'Location': [1287], 'Latitude': [1288], '°N': [1289], 'Longitude': [1290], '°E': [1291], '(utc)': [1294, 1309], '(min)': [1297, 1312], 'Gt': [1298, 1313], '(km)': [1301, 1316], '(ms−1)': [1304, 1319, 2896], 'Amplitude': [1305, 1320, 2814, 2816, 2920], '(hPa)': [1306, 1321], 'Lerwick': [1322], 'Observatory': [1323, 1470, 1619, 2537, 2660, 2782], '60.13': [1324], '−1.18': [1325], '1807': [1326], '832': [1327], '585': [1329], '312.2': [1330], '2.9': [1331], '0153': [1332], '223': [1333], '4419': [1334], '330.3': [1335], '1.2': [1336, 1439], 'Wick': [1337], 'Airport': [1338], '58.45': [1339], '−3.08': [1340], '1818': [1341], '843': [1342], '750': [1344], '311.4': [1345], '2.5': [1346, 1360, 1403, 1449, 1463], '0147': [1347, 1361], '217': [1348, 1362], '4276': [1349], '328.4': [1350], '2.0': [1351], 'Stornoway': [1352], '58.21': [1353], '−6.37': [1354], '1816': [1355], '841': [1356], '820': [1358], '313.5': [1359, 1402], '4254': [1363], '326.7': [1364], '1.7': [1365, 1380, 1424, 1512, 1571, 1632], 'Edinburgh,': [1366], 'Gogarbank': [1367], '55.93': [1368], '−3.35': [1369], '1829': [1370], '854': [1371], '021': [1373], '312.7': [1374], '2.6': [1375], '0132': [1376], '202': [1377], '3983': [1378], '328.6': [1379], 'Belmullet': [1381], '54.23': [1382], '−10.01': [1383], '1821': [1384], '846': [1385], '238': [1387], '319.9': [1388], '1.1': [1389], '0134': [1390], '204': [1391], '3938': [1392], '321.7': [1393, 1631], '0.8': [1394, 1498], 'Bingley': [1395], '53.82': [1396], '−1.87': [1397], '1840': [1398], '865': [1399], '271': [1401], '0118': [1404, 1450], '188': [1405, 1451], '3734': [1406], '331.0': [1407], '1.8': [1408, 1454, 1468, 1617], 'Dublin,': [1409], 'Phoenix': [1410], 'Park': [1411], '53.36': [1412], '−6.35': [1413], '1834': [1414], '859': [1415], '162': [1417], '313.6': [1418], '1.4': [1419, 1434, 1601], '0121': [1420], '191': [1421], '3761': [1422], '328.2': [1423], 'Mace': [1425], 'Head': [1426], '53.33': [1427], '−9.90': [1428], '1825': [1429], '850': [1430], '338': [1432], '320.4': [1433], '0131': [1435], '201': [1436], '3844': [1437], '318.7': [1438], 'Smallwood,': [1440], 'Sandbach': [1441], '53.16': [1442], '−2.33': [1443], '1843': [1444, 1458], '868': [1445, 1459], '337': [1447], '313.7': [1448, 1565], '3668': [1452], '325.2': [1453], 'Newchapel': [1455], '53.09': [1456], '−2.21': [1457], '346': [1461], '313.9': [1462], '0116': [1464], '186': [1465], '3658': [1466], '327.8': [1467], 'Valentia': [1469], '51.94': [1471], '−10.20': [1472], '1830': [1473], '855': [1474], '487': [1476], '321.4': [1477], '1.0': [1478, 3661], '0123': [1479], '193': [1480], '3714': [1481], '320.7': [1482], '1.3': [1483, 1493, 1612], 'Roches': [1484], 'Point': [1485], '51.79': [1486], '−8.24': [1487], '1832': [1488], '857': [1489], '523': [1491], '321.3': [1492, 1497], '0119': [1494], '189': [1495], '3643': [1496], 'Almondsbury': [1499], '51.55': [1500], '−2.56': [1501], '1850': [1502], '875': [1503], '508': [1505], '314.4': [1506, 1537], '2.1': [1507], '0111': [1508], '181': [1509], '3496': [1510], '321.9': [1511], 'Oldland,': [1513], 'East': [1514], 'Bristol': [1515], '51.44': [1516, 1531], '−2.48': [1517], '1849': [1518], '874': [1519], '522': [1521], '315.1': [1522], '2.2': [1523], '0112': [1524], '182': [1525], '3483': [1526], '319.0': [1527], '1.9': [1528], 'Reading': [1529, 2534, 2564, 2657, 2779, 3544, 3653], '−0.94': [1532], '1852': [1533], '877': [1534], '542': [1536, 1564], '2.4': [1538, 1566, 1596], '0105': [1539], '175': [1540], '3462': [1541], '329.7': [1542], '1.5': [1543], 'Wokingham': [1544], '51.42': [1545], '−0.85': [1546], '1851': [1547], '876': [1548], '546': [1550], '314.8': [1551], '2.3': [1552, 1581], '0104': [1553], '174': [1554], '3459': [1555], '331.3': [1556], '1.6': [1557, 1586, 1627], 'Thatcham': [1558], '51.41': [1559], '−1.28': [1560], '1854': [1561], '879': [1562], '0108': [1567], '178': [1568], '3463': [1569], '324.3': [1570], 'Stratfield': [1572], 'Mortimer': [1573], '51.37': [1574, 1589], '−1.04': [1575], '1846': [1576], '871': [1577], '549': [1579], '316.7': [1580], '0106': [1582], '176': [1583], '3456': [1584], '327.3': [1585], 'Herne': [1587], 'Bay': [1588], '1.11': [1590], '885': [1592], '571': [1594], '312.1': [1595], 'No': [1597], 'clear': [1598], 'signature': [1600], 'Hill,': [1603], 'Cornwall': [1604], '50.56': [1605], '−4.44': [1606], '1855': [1607], '880': [1608], '581': [1610], '314.0': [1611], '0110': [1613], '180': [1614], '3424': [1615], '317.0': [1616], 'Jersey': [1618, 2182], '49.10': [1620], '−2.10': [1621], '1903': [1622], '887': [1623], '781': [1625], '315.3': [1626], '0057': [1628, 2184], '167': [1629], '3223': [1630], 'manifested': [1640], 'series': [1643, 2242, 3815], 'rapid': [1645, 1701, 2122, 2268], 'rises': [1646], 'falls': [1648, 2123], 'over': [1651, 1679, 2370, 2500, 2785, 2894, 3300, 3366, 3821], '30min,': [1653], 'followed': [1654, 2116], 'hour': [1657], 'disturbed': [1662], 'conditions.': [1663], 'disturbance': [1668, 2261], 'sufficient': [1670], 'register': [1672], 'barographs,': [1674], 'amounting': [1675, 2136], 'little': [1678], '2hPa': [1680], 'many': [1682, 3491], 'slightly': [1685], '(2.9hPa': [1690], 'Lerwick),': [1692], 'decreasing': [1693], 'southwards': [1694], '(1.6hPa': [1695], 'Channel': [1698], 'Islands).': [1699], 'Such': [1700], 'changes': [1702, 2842, 2853, 2946, 2957], 'uncommon,': [1704], 'even': [1705, 1845], 'major': [1707, 1803], 'frontal': [1708], 'boundaries.': [1709], 'airwave,': [1714], 'divided': [1724], 'elapsed': [1728], 'site,': [1742], 'remarkably': [1744], 'consistent,': [1745], 'averaging': [1746, 1828, 2217], '315': [1747, 1883, 2897, 2902], '±': [1748, 1884, 2334, 2407], '3ms−1': [1749, 1885], '35': [1751, 2319], 'Isles.': [1758, 3088], 'There': [1759, 2967], 'minor': [1762, 2297], 'uncertainties': [1763], 'calculation,': [1766], 'do': [1769], 'significantly': [1771], 'affect': [1772], 'result:': [1774], 'taken': [1782, 1863, 2817, 2921], 'US': [1784, 3902, 3915], 'Survey': [1786], 'data,': [1787], 'may': [1789, 1797, 1861], 'continued': [1791, 1922], 'there': [1796], 'than': [1801, 2258, 2365, 2414], 'one': [1802], 'blast;': [1804], 'exact': [1806], 'subject': [1814], 'subjectivity': [1817], 'when': [1818], 'examining': [1819], 'records;': [1821], 'individual': [1823], 'response,': [1825], 'lag': [1826], 'unknown,': [1832], 'although': [1833, 2486, 2840, 2944, 3168], 'less.': [1839], 'In': [1840, 3369], 'all,': [1841], 'uncertainty': [1843], '±5min': [1846], 'lead': [1848], 'error': [1851], 'velocity': [1854, 1881, 2893, 3157], 'only': [1856], '±2ms−1,': [1857], 'so': [1858], 'results': [1860], 'reasonably': [1865], 'well': [1866], 'bounded.': [1867], 'sound': [1871, 1891, 2342], 'air': [1873, 3754], '20°C': [1875], '348ms−1.': [1877], "I's": [1879], 'corresponds': [1886, 2337], '−28°C,': [1894], 'reasonable': [1898], 'approximation': [1899], 'mid-level': [1902], 'temperature': [1903, 2356], 'through': [1907], 'passed': [1912, 3820], 'journey': [1915, 2205], 'site.': [1919], 'onward': [1923], 'past': [1924], 'Isles,': [1929], 'passing': [1930, 2369], 'Malaga': [1931, 2177], 'southeast': [1934], 'Spain': [1936], '2020': [1938], 'eventually': [1940, 2193], "eruption's": [1943], '4.61°E,': [1947], 'extreme': [1950], 'Algeria,': [1953], '3),': [1955, 2071], 'itself.': [1962], 'diameter': [1964], 'maximum': [1974, 2825, 2929], '90°': [1976], 'narrowed': [1982], 'it': [1984, 1991, 2346, 3278, 3371, 3954], 'converged': [1985], 'point.': [1989], 'As': [1990], 'vicinity': [1994], 'point,': [1998, 2027], '(now': [2001], 'referred': [2002], 'IA)': [2006], 're-emanated': [2007], 'circular': [2011], 'ripple': [2012], 'opposite': [2015, 3536], 'direction,': [2016], 'if': [2018], 'secondary': [2021], 'source': [2022, 3585], 'near': [2025], '2210': [2030], '(A': [2032], 'second': [2033], 'can': [2038, 3410], 'seen': [2040], 'reference': [2043], 'given': [2044], 'Barlow,': [2046], '2022.)': [2047], 'Particularly': [2048], 'interesting': [2049, 3166], '(22.8°N,': [2059], '5.5°E),': [2060], 'few': [2063, 2994, 3520], 'hundred': [2064], 'kilometres': [2065], 'pronounced': [2081, 3143], 'jump': [2082], '2151': [2086], ').': [2090], '310ms−1.': [2101], 'suggests': [2106], '‘inbound’': [2112, 2416], '15–20min': [2118], '‘departure’': [2128], 'now': [2131], 'diverging': [2132], 'IA,': [2135], 'fall': [2141, 2269, 2390, 3123, 3295, 3679], '3.5hPa': [2143], '7min': [2145], '2213': [2147], 'This': [2154, 2336, 3162], 'then': [2158, 2303, 2396], 'retraced': [2159], 'path': [2161], 'original': [2164], 'Europe,': [2168], 'time,': [2173, 3176], '0005': [2179], 'departing': [2187], 'Shetland': [2188], '56min': [2189], 'later': [2190, 2202], '5b),': [2192], 'converging': [2194], 'globe': [2208], 'back': [2210], 'taking': [2211, 3364], 'just': [2212], 'under': [2213, 3458], '36': [2214], '(and': [2216, 3518], '311ms−1': [2219], 'velocity).': [2220], 'quite': [2227, 2484], 'differently': [2228], 'well-defined': [2246], '6–8min,': [2252], 'visibly': [2253], '‘cleaner’': [2254], 'regular': [2257], '4).': [2263], 'recorded': [2266, 3212], 'mid-series': [2273], 'typical': [2276], 'overall': [2277], '1.5–1.6hPa.': [2280], 'If': [2281, 2374], 'we': [2282, 2304], 'take': [2283], 'peak': [2298], 'train,': [2302], 'obtain': [2305], 'somewhat': [2307], 'value': [2309], 'return': [2315], 'wave:': [2316], 'examined': [2321, 2558], '(a': [2322], '1),': [2329], 'average': [2331, 2398], '325': [2333], '5ms−1.': [2335], '−10°C,': [2344], 'unreasonable': [2350], 'assume': [2352], 'higher': [2354], 'mean': [2355], 'returning': [2360], 'northwards': [2361], 'Africa': [2364], 'polar': [2372], 'regions.': [2373], 'instead': [2375], 'assumed': [2381], 'coincident': [2384], 'start': [2387], 'towards': [2391], 'minimum': [2393, 2823, 2927], 'value,': [2395], '275': [2406], '7ms−1': [2408], 'obtained,': [2410], '13%': [2412], 'I.': [2418], 'truth': [2420], 'probably': [2421, 2483], 'somewhere': [2423], 'two,': [2426], 'actual': [2429], 'wavefront': [2430], 'obscured': [2433], 'superposition': [2436], 'interference': [2438], 'follow-on': [2441], 'oncoming': [2448], 'IA.': [2450], 'Mid-tropospheric': [2451], 'winds': [2452], 'particularly': [2455, 3165], 'strong,': [2456], 'broadly': [2458], 'southwest': [2460], 'west': [2462], 'orthogonal': [2466], 'waves,': [2472, 3949], 'effect': [2475], 'minor,': [2485], 'no': [2487], 'doubt': [2488], 'other': [2491, 2556], 'factors': [2492], 'will': [2493], 'evaluated': [2495], 'detailed': [2497, 3533], 'numerical': [2498], 'simulations': [2499], 'coming': [2502], 'months.': [2503], 'Second,': [2504], 'third': [2505, 2518], 'fourth': [2507, 2520], 'passages': [2509], 'Clear': [2510], 'evidence': [2511], 'exists': [2512], 'second,': [2517, 2572], 'Ireland.': [2525], '6': [2527], 'barometric': [2530, 2567, 2648, 2826, 2930, 3621], 'Atmospheric': [2536, 2659, 2781], '1500': [2541, 2664], '0600': [2546, 2669], 'January;': [2549], 'similar': [2550, 3069], 'fluctuations': [2551], 'most': [2555, 2841, 2945, 3503], 'analysis.': [2561], 'station-level': [2566, 2647], 'logged': [2570], 'every': [2571], 'II/IIA': [2578], 'III/IIIA': [2580], 'shown.': [2583], 'IV': [2585, 2799], 'IVA': [2587, 2800], 'also': [2589], 'analysis': [2594, 3506], '(not': [2598], 'shown)': [2599], 'around': [2601], '0530': [2602], '1130': [2605], 'latter': [2611], 'Thereafter,': [2618], 'noise': [2619], 'normal': [2622], 'synoptic': [2623], 'diurnal': [2625], 'variability': [2626], 'make': [2627], 'unambiguous': [2628], 'identification': [2629], 'any': [2634, 3283, 3390], 'challenging.': [2640], '6Open': [2642], 'record,': [2650, 3559], '1s': [2651], '<0.1-hPa': [2653], 'resolution,': [2654], 'identifying': [2674], 'three': [2680], 'airwaves,': [2681], 'insets': [2683], 'detail.': [2690], 'main': [2695, 3023, 3090, 3120], 'consists': [2697], '313': [2699], '200': [2700], 'separate': [2701], 'points,': [2703], 'each': [2705, 2732], 'inset': [2706], '21': [2708], '600': [2709], 'records.': [2710, 3434], '2': [2712], 'various': [2722], 'derivation': [2727], 'circuit.': [2733], 'vary': [2739], 'inversely': [2740], 'logarithm': [2743], 'cumulative': [2745], '‘eruption': [2751], 'zero’.': [2752], '2.': [2754], 'Passage': [2755], 'amplitudes': [2758, 3230], 'observed': [2776, 3001], '(51.441°N,': [2783], '0.938°W)': [2784], '15–20': [2788, 3630], 'no.': [2792], 'II': [2795], 'IIA': [2796], 'III': [2797], 'IIIA': [2798, 2856, 2960], '(date/time': [2804], '15/1852': [2806], '16/0105': [2807], '17/0700': [2808], '17/1300': [2809], '18/1835': [2810], '19/0115': [2811], '20/0530': [2812], '20/1130': [2813], '(hPa)**': [2815], 'difference': [2820, 2924], 'occurred': [2843, 2947, 2965], 'shorter': [2846, 2950], 'period.': [2847, 2951], 'Synoptic': [2848, 2952], 'trends': [2849, 2953], 'distorted': [2850, 2954], 'wave-related': [2851, 2955], 'onwards.': [2857, 2961], '2.38': [2858], '1.72': [2859], '1.28': [2860], '0.87': [2861], '0.42': [2862], '0.40': [2863], '0.26': [2864], '<0.2': [2865], 'Elapsed': [2866], '(h)': [2870], '14.6': [2871], '20.8': [2872], '50.7': [2873], '56.7': [2874], '86.3': [2875], '93.0': [2876], '121.2': [2877], '127.2': [2878], 'Segment': [2879], '(m': [2881, 2908], '×': [2882, 2909], '106)': [2883, 2910], '16.5': [2884, 2911], '3.5': [2885, 2887, 2889, 2891], '40.0': [2886, 2888, 2890], 'segment': [2895], '330': [2898], '307': [2899], '321': [2900, 2904], '312': [2901], '318': [2903], 'Cumulative': [2905], 'covered': [2907], '20.0': [2912], '60.0': [2913], '63.5': [2914], '103.5': [2915], '107.0': [2916], '147.0': [2917], '150.5': [2918], '*': [2919], 'Have': [2962], 'previously?': [2966], 'documented': [2970, 3392], 'instances': [2971], 'propagating': [2975], 'disturbances,': [2979], 'anthropogenic': [2983], '(conventional': [2984], 'explosions': [2985, 3343], 'nuclear': [2987], 'bomb': [2988], 'tests': [2989], 'example),': [2991], 'parallel': [2995], 'occasion.': [3004], "Society's": [3007], 'report': [3009, 3092], '(Symons,': [3010, 3093], 'significant': [3016, 3284], 'multiple': [3018], 'cataclysm': [3024], '0256': [3026], 'gmt': [3027], '1883,': [3031], 'illustrating': [3032], 'account': [3034], 'miniaturised': [3036], 'barograph': [3037, 3080, 3169, 3287, 3500], 'traces': [3038, 3081, 3288], 'world': [3044], '(11': [3045], 'Isles).': [3051], 'summarised': [3059], 'Scott': [3061, 3809], '(1883)': [3062], 'amounted': [3064], '1.7–2.7hPa': [3066], 'present': [3072], 'discussion.': [3073], 'His': [3074], 'paper': [3075, 3603], 'included': [3076], 'scaled': [3077], 'reproductions': [3078], 'nine': [3083], 'locations': [3084], 'tracked': [3097], 'six': [3098], 'outbound/rebound': [3099], 'part': [3102], 'seventh': [3105], '(i.e.': [3106], 'VI/': [3110], 'VIA': [3111], 'VII),': [3113], '126': [3116], 'explosion': [3125, 3777], 'Tunguska': [3128, 3327, 3731], 'meteor': [3129, 3299, 3946], 'Siberia': [3131], '0016': [3134], '30': [3137], 'June': [3138, 3259, 3888], '1908': [3139, 3730], 'produced': [3140, 3208], 'single': [3142], 'England': [3146], '~0.15hPa': [3149], '(Whipple,': [3150], '1930;': [3151], 'Astapowitsch,': [3152], '1934;': [3153], 'Deacon,': [3154], '1982),': [3155], 'assessed': [3159], '290ms−1.': [3161], 'because,': [3167], 'jiggles': [3170], 'remarked': [3172], 'cause': [3178], 'remained': [3182], 'unknown': [3183], 'until': [3184], 'Mt': [3192, 3252], 'St': [3193, 3747], 'Helens': [3194, 3748], 'Washington': [3196], 'state': [3197], 'USA': [3200], '1532': [3202], 'May': [3206, 3752], '1980': [3207], '(sensitive': [3215], 'microbarographs': [3216], 'De': [3218], 'Bilt': [3219], 'Germany),': [3225], 'barely': [3228], 'measurable': [3229], '(also': [3231], '~0.15hPa);': [3232], 'averaged': [3237], '308ms−1': [3238], '(Donn': [3239], 'Balachandran,': [3241], '1981).': [3242], 'recent': [3248, 3380], 'decades,': [3249], 'Pinatubo': [3253, 3885], 'Philippines': [3256], '1991,': [3260, 3890], 'did': [3261, 3279, 3293], 'generate': [3262], 'sensitive': [3268], 'infrasound': [3269], 'equipment': [3270], 'Japan': [3272], '(Tahira': [3273], 'et': [3274, 3874], 'al.,': [3275], '1996),': [3276], 'result': [3281], 'effects': [3285], 'western': [3290], 'Europe:': [3291], 'nor': [3292], 'Chelyabinsk': [3298], 'Ural': [3303], 'region': [3304], 'Russia': [3306], '0320': [3309], 'February': [3313, 3722, 3805, 3911, 3936], '2013,': [3314], 'known': [3317], 'object': [3319], 'entered': [3322], "Earth's": [3323], 'event.': [3328, 3421], 'Was': [3329], 'differentiator': [3331], 'sudden': [3341], 'exacerbated': [3349], 'contact': [3352], 'enormous': [3354], 'volumes': [3355], 'seawater,': [3357], 'opposed': [3359], 'land-based': [3361], 'magmatic': [3362], 'activity': [3363], 'place': [3365], 'several': [3367], 'hours?': [3368], 'conclusion,': [3370], 'seems': [3372], 'certain': [3373], 'previously': [3391], 'reliable': [3400], 'instrumental': [3401], '150': [3406], 'years.': [3407], 'occurrence': [3409], 'truly': [3412], 'regarded': [3414], '‘once': [3417], 'lifetime’': [3420], 'Acknowledgements': [3422], 'came': [3428], 'professional': [3431], 'amateur': [3433], 'Thanks': [3435], 'Met': [3439, 3442, 3452, 3575], 'Office': [3440], 'Eireann': [3443, 3453], 'who': [3444], 'kindly': [3445, 3475, 3531], 'provided': [3446, 3532, 3562], 'own': [3450], 'sites:': [3451], '(www.met.ie)': [3455], 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