Recent Earthquakes

Abstract

THE United States Coast and Geodetic Survey, in co-operation with Science Service and the Jesuit Seismological Association, has determined the provisional epicentres of three recent earthquakes. These determinations were based on instrumental data received from the seismological observatories at Weston, Mobile, Tucson, Georgetown, Chicago, Burlington, Fordham, Buffalo, Philadelphia, Tacubaya, Honolulu, Lincoln, Pasadena, St. Louis, San Juan, Sitka and Huancayo. The first earthquake was on January 24, and took place at 20h. 42 -1m. TJ.T. from an epicentre near latitude 15° N.,- longitude 91° W. This is south-east of Sta. Cruz Quiche in Guatemala, Central America. The second shock occurred on January 27 at 2h. 45 -2m. TT.T. from an epicentre near latitude 52° N., longitude 180°W., which is in the North Pacific Ocean in the Aleutian Islands Archipelago between Bat Island and Tanaga Island. Both these earthquakes had a normal depth of focus. The third earthquake here detailed took place on January 30 at 5h. 33-Om. TJ.T. from an epicentre near latitude 2° S., longitude 80° W., which is very near to Guayaquil in Ecuador in South America. This earthquake had a depth of focus probably about 100 km., which is below normal, though not unexpected in the region in question. All these epicentres are in well-known seismic regions.