Monthly Archives: November 2015

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 … Continue reading

Posted in College Redwoods, earthquake, education, geology, HSU, plate tectonics, San Andreas, strike-slip

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 … Continue reading

Posted in College Redwoods, earthquake, education, geology, HSU, pacific, plate tectonics, strike-slip, subduction, Transform

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 … Continue reading

Posted in Uncategorized

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 / … Continue reading

Posted in alaska, College Redwoods, earthquake, education, geology, HSU, pacific, plate tectonics, subduction, Transform

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 … Continue reading

Posted in alaska, College Redwoods, education, geology, HSU, pacific, plate tectonics, subduction

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 … Continue reading

Posted in cascadia, earthquake, education, geology, gorda, HSU, humboldt, mendocino, pacific, plate tectonics, San Andreas, strike-slip, Transform