Late last night (my time) there was an earthquake in Greece with a USGS magnitude of M = 6.5. Here is the USGS web site for this earthquake. Greece is at the intersection of a complex configuration of plate boundaries.…
Earthquake Report: Chile in 2015!
The patch of the Chile subduction zone that ruptured in September 2015 continues to have large magnitude aftershocks. Today (2015.11.11) there were two M = 6.9 earthquakes in the northern part of this region. Four days ago (2015.11.07) there was…
Earthquake report: Aleutian subduction zone at the Amlia fracture zone update
Today (2015.11.09) we had another moderate sized earthquake along the Aleutian subduction zone, the largest of four earthquakes of magnitude mid 5-6. My initial earthquake report form 2015.11.02 can be found here. Here are the USGS web sites for the…
Earthquake Report: Nicobar Isles and Sumatra!
This past 24 hours include two large earthquakes in the region of the Sumatra-Andaman subduction zone offshore of Sumatra. Here is a map using the USGS online GIS interface. Here are the two large earthquakes posted on the USGS websites:…
Earthquake Report: Chile!
This past evening there were several earthquakes in the region of the 2015 Cocquimbo earthquake region. The largest earthquake has a USGS magnitude M = 6.8. Here are the three largest earthquakes, in order of occurrence: 2015.11.07 M 6.2 2015.11.07…
Earthquake Report: Pacoima!
Early this morning, there was a M 3.5 earthquake that was widely felt across southern California. It is a good reminder for people to prepare for the potential of larger earthquakes in this region. The last earthquake of significant magnitude…
Earthquake Report: Bismarck Sea!
Last night we had an earthquake in the Bismarck Sea, a region that is formed by an oceanic spreading ridge and bordered to the north and to the south by subduction zones. This M = 5.3 earthquake is small in…
Earthquake near Petrolia!
There was a M = 3.0 earthquake near Petrolia, CA today. Here is the USGS website for this earthquake. On Oct. 28, 2015, there was a small earthquake near Bayside, CA. Here is a map where I plot the focal…
Amlia fracture zone earthquake: Update #1
While in my slumber, the USGS prepared a moment tensor and another aftershock occurred. Below is an updated map to my initial report here. I plot this moment tensor, which shows a compressional mechanism. I placed a moment tensor /…
Earthquakes along the Amlia fracture zone!
There were just a few earthquakes in the mid 5 magnitude range. The first one was largest, so we would consider the others aftershocks. They appear to align north-south, so may be related to the Amlia fracture zone. The Amlia…