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…
Mendocino fault earthquake!
We just had a M = 4.3 earthquake along the Mendocino fault zone. Here is the USGS website for this earthquake. There were some earthquakes of similar magnitude along the MF recently in January 2014 and April, 2015. This earthquake…
Earthquake near Chico!
I hope not too many bottles of Sierra Nevada broke from this small earthquake. Based on the “Did You Feel It?” reports, I suspect that this did not happen. Here is the USGS website for this M = 3.5 earthquake.…
Earthquake in Bayside (northern California)!
We just had a small earthquake in northern California. Here is the USGS website for the M = 3.4 earthquake. If you felt it, please go to the USGS “Did You Feel It?” website to fill out a report! This…
Afghanistan Earthquake: Update #1
There have been several data updates following the earthquake yesterday. I presented my first summary about this M = 7.5 earthquake here. There are a number of sources of information regarding the casualties from this devastating earthquake posted on this…