Category Archives: cascadia

Earthquake Report: Mendocino fault! (northern California)

I was driving around Eureka today, running to the appliance center to get an appliance (heheh). I got a message from a long time held friend (who lives in Salinas, CA). They asked me if I was OK, given that … Continue reading

Posted in cascadia, earthquake, education, geology, gorda, HSU, mendocino, strike-slip, Transform

Earthquake Report: Gorda plate

We just had an earthquake in the Gorda plate. The USGS magnitude is 5.1. This earthquake happened a few kilometers southwest of the 2014 M 6.8 earthquake. Based upon the orientation of the faults in the region, today’s earthquake may … Continue reading

Posted in cascadia, earthquake, geology, gorda, strike-slip

Earthquake Report: Trinidad, California

Early this morning, I was awakened by a mild jolt. I thought, well, seems like a M 3+- nearby. I did not get out of bed. The main shaking lasted a couple of seconds, though it seemed that there was … Continue reading

Posted in cascadia, earthquake, geology, gorda, pacific, plate tectonics, San Andreas, strike-slip, subduction

Earthquake Report: 1992.04.25 M 7.1 Petrolia

The 25 April 1992 M 7.1 earthquake was a wake up call for many, like all large magnitude earthquakes are. Here is my personal story. I was driving my girlfriend’s car (Jen Guevara) with her and some housemates up to … Continue reading

Posted in cascadia, earthquake, education, geology, humboldt, mendocino, pacific, plate tectonics, San Andreas, subduction, tsunami

Earthquake Report: 1700 Cascadia subduction zone 317 year commemoration

Today (possibly tonight at about 9 PM) is the birthday of the last known Cascadia subduction zone (CSZ) earthquake. There is some evidence that there have been more recent CSZ earthquakes (e.g. late 19th century in southern OR / northern … Continue reading

Posted in cascadia, earthquake, education, geology, gorda, HSU, humboldt, oregon, pacific, plate tectonics, San Andreas, subduction, Transform, tsunami, washington

Earthquake Report: Explorer plate!

In the past 2 days there have been a few earthquakes in the Explorer plate region along the Pacific-North America plate boundary. On March 19 of this year there was a series of earthquakes in this same region (to the … Continue reading

Posted in cascadia, earthquake, education, geology, HSU, pacific, plate tectonics, strike-slip, subduction

Earthquake Report: 2016 Summary Cascadia

Here I summarize the seismicity for Cascadia in 2016. I limit this summary to earthquakes with magnitude greater than or equal to M 4.0. I reported on all but five of these earthquakes. I put this together a couple weeks … Continue reading

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

Earthquake Report: Mendocino fault Update #1

Today is one of my busiest days of the semester. I am administering a final and my two classes are presenting their video projects. Then, we had this M 6.5 earthquake in the wee hours and a M 7.7 (prelim … Continue reading

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

Earthquake Report: Mendocino fault!

I was awake and just logging into my laptop, still in bed, when I first felt some movement. The movement was slight and not impulsive, so I thought it was a small earthquake. Then the shaking reappeared. This is when … Continue reading

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

Earthquake Report: Petrolia (CA)

This morning there was a good shaker that was widely felt across the region. I did not feel it. I was probably driving at the time, or grading papers, which can have the same sense-deadening effect. Here is the USGS … Continue reading

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