The earthquakes keep rolling in to GRMI!
August continues to be a seismically busy month. GRMI picked up 3 notable earthquakes in the past week. You may not have heard about the magnitude 8.2 earthquake near Fiji on August 19th. That is because, at a depth of 563 km, this “deep-focus” earthquake was too distant to cause any damage on the surface of the Earth.
You may have heard of the widely felt magnitude 7.3 earthquake that shook Venezuela on August 21st. Large earthquakes are relatively rare in this region and this is the largest historic quake within 250 km of the surface in the last century. Fortunately, this earthquake was also relatively deep (123 km) and caused little damage.
Finally, on the morning of August 22nd, a magnitude 6.2 earthquake was generated on the seafloor off the Oregon coast. The earthquake appears to have been generated where the tiny Juan De Fuca tectonic plate (which is being subducted or shoved under the North American continent) is sliding past the huge Pacific plate. Despite being just 10 km below the sea floor, there was no tsunami generated.
If you are interested in earthquakes recorded by the GRCC seismometer, you can find them on the MIQuakes website.
GRMI seismogram of the M8.2 Fiji earthquake on August 19th (red arrow):
GRMI seismogram of the M7.3 earthquake in Venezuela (red arrow) and the M6.2 Oregon earthquake (blue arrow):