We just had an earthquake offshore of Colima, Mexico. This earthquake appears associated with the Rivera fracture zone (RFZ), a transform plate boundary separating the Rivera plate to the north and the Pacific plate to the south. The RFZ connects…
Earthquake Report: Cuba!
We just had three earthquakes on the southern boundary of Cuba. Here are the USGS websites for these earthquakes: 2016.01.17 M 4.6 2016.01.17 M 5.1 2016.01.17 M 5.1 These do not have USGS moment tensors, but I suspect that they…
Earthquake Report: 2015 Summary M GT 7
Here I summarize the global seismicity for 2015. I limit this summary to earthquakes with magnitude greater than or equal to M 7.0. I reported on all but one of these earthquakes. Here are all the annual summaries: 2015 Earthquake…
Earthquake Report: San Bernardino (Devore)!
A couple days ago, I was on the road and did not yet have my laptop. Therefore I am reporting about this earthquake a few days afterwards… There has been a swarm of seismic activity in the San Bernardino area.…
Earthquake Report: Humboldt County, CA!
Tonight we had a small earthquake offshore of northern California, northwest of Trinidad. Here is the USGS website for this earthquake with a magnitude of 3.2. At first glance, this earthquake appears to be close to the location of the…
Earthquake Report: Solomons!
Today we had a good sized earthquake along the S. Solomon trench, however, it was not a subduction zone earthquake, but a strike-slip earthquake in the downgoing plate. Here are the largest earthquakes plotted in the map below. S. Solomon…
Earthquake Report: Greece!
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: 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: 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…
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 /…