Archive for April, 2017

M 6.9 – 28km SW of Burias, Philippines – April 28, 2017

April 29, 2017

USGS Event Report
2017-04-28 20:23:17 (UTC)
28km SW of Burias, Philippines
Magnitude 6.9
Location  5.516°N  125.093°E
Depth 26 km



Seismotectonics of the Philippine Sea and Vicinity by USGS
“The Philippine Sea plate is bordered by the larger Pacific and Eurasia plates and the smaller Sunda plate. The Philippine Sea plate is unusual in that its borders are nearly all zones of plate convergence. The Pacific plate is subducted into the mantle, south of Japan, beneath the Izu-Bonin and Mariana island arcs, which extend more than 3,000 km along the eastern margin of the Philippine Sea plate. This subduction zone is characterized by rapid plate convergence and high-level seismicity extending to depths of over 600 km. In spite of this extensive zone of plate convergence, the plate interface has been associated with few great (M>8.0) ‘megathrust’ earthquakes.”


M 6.9 – 38km W of Valparaiso, Chile – April 24th, 2017

April 24, 2017

USGS Earthquake Event Page
2017-04-24 21:38:25 (UTC)
38km W of Valparaiso, Chile
Magnitude 6.9
Location  -33.056°S   -72.042°W
Depth 10km

The seismogram below was recorded at CJ Prescott Elementary School, Norwood, MA:

M 5.8 – 259km WNW of Iquitos, Peru – April 18, 2017

April 19, 2017

USGS Event Report
2017-04-18 17:49:55 (UTC)
Magnitude 5.8
Location  -2.733°S  -75.351°W
Depth 14 km

Display below created by Kristi Fink, Texas Educational Seismology Project: