We just had a good sized earthquake adjacent to the mapped surface trace of the Bartlett Springs fault, southeast of Lake Pillsbury. Here is the USGS website for the M 5.1 earthquake. Here is my interpretive map that shows the…
#EarthquakeReport Mariana Trench!
Earlier this year, there was an intermediate depth earthquake along the Mariana Trench with a magnitude of M 7.7. I was traveling and did not have the opportunity to prepare a report at the time. While getting together my annual…
Earthquake Report: Bayside (northern California): Update #1
So, I put together another map with today’s earthquake in context with the historic seismicity and some other factors. Now the USGS magnitude is M = 4.7 and there is a moment tensor for this earthquake (that looks very similar…
Friends of the Arcata Marsh 2016.07.22
I present material about the Cascadia subduction zone for the Friends of the Arcata Marsh (FOAM) held on 7/22/16 at the Arcata Marsh Interpretive Center. This page has some supporting material from this presentation, including the digital presentation file. The…
Earthquake Report: Vanuatu!
We just had a large earthquake in the Vanuatu region, just south of a series of earthquakes from a couple weeks ago. Here is the USGS website for today’s M 7.0 earthquake. I include some figures and animations that I…
Earthquake Anniversary: M 7.8 Gorkha (Nepal) Earthquake
An anniversary is for the Gorkha (Nepal) Earthquake from 1 year ago. I have several Earthquake Reports listed below. These include a variety of observations and comparisons with historic and prehistoric earthquakes that I compiled. USGS slip models: http://earthjay.com/?p=2478 First…
Earthquake Report: Kyushu, Japan!
As I was preparing an aftershock map for yesterday’s earthquake, an earthquake with a magnitude of M = 7.0 happened. This turns all other earthquakes into foreshocks, though this terminology may not really be important (foreshock vs aftershock). The M…
Earthquake Report: Kamchatka!
A couple weeks ago, there was an earthquake with a magnitude of M 6.4 and today there was an earthquake with a magnitude of M 5.7. I had not put together a report for the M 6.4, so this report…
Earthquake Report: Burma!
Here is my preliminary earthquake report. There was an earthquake with a magnitude of M 6.9 in Burma. Here is the USGS web page for this earthquake. Based upon the modeling, this appears to likely be a very damaging earthquake…
Earthquake Report: Vanuatu!
We just had another M 6.9 earthquake about 40 km from another M 6.9 earthquake from a few days ago. Here is my earthquake report from that earlier earthquake. They are both about the same depth. While the depths probably…