Abstract
ACCORDING to the Central Seismological Bureau at Strasbourg there were 152 earthquakes each recorded at more than one observatory or experienced by people during the month of April. This was 52 more than during March (NATURE, June 10, p. 988). The greatest number recorded on any one day was on April 6, when 14 occurred, and the least number recorded on any one day was 2 on each of April 8, 9, 28 and 30. The most important shocks during the month wero probably those of April 1 (strength VIII) felt near Mostaganem in Algeria, April 18 at 6.23 G.C.T. in Chile (epicentre 27° S., 70° W. approx.), and that of April 30 felt at Guadalcanar and several other places in the Solomon Islands. The next most intense were the earthquakes of April 5 with epicentre near 20° S., 168° W., in the New Hebrides, April 21 at 4.29 G.C.T. (epicentre near Yeso), and April 23 at 16.23 G.C.T. (epicentre in the Atlantic near 1° S., 17° W.). Apart from these individual shocks there appears to have been a good deal of moderately intense seismological activity in Italy as earthquake shocks have been experienced at Livorno on more than one occasion, in the Frioul district and near Mont Amiata.
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Earthquakes during April 1939. Nature 144, 109 (1939). https://doi.org/10.1038/144109a0
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DOI: https://doi.org/10.1038/144109a0