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Category Archives: mendocino
Earthquake Report: Mendocino triple junction
Well, it was a big mag 5 day today, two magnitude 5+ earthquakes in the western USA on faults related to the same plate boundary! Crazy, right? The same plate boundary, about 800 miles away from each other, and their … Continue reading
Posted in cascadia, earthquake, education, geology, gorda, humboldt, mendocino, mendocino, pacific, plate tectonics, San Andreas, strike-slip, subduction, Transform
Earthquake Report: Salt Lake City
As I was waking up this morning, I rolled over to check my social media feed and moments earlier there was a good sized shaker in Salt Lake City, Utah. I immediately thought of my good friend Jennifer G. who … Continue reading
Posted in cascadia, earthquake, education, geology, gorda, humboldt, mendocino, mendocino, pacific, plate tectonics, San Andreas, strike-slip, subduction, Transform
Earthquake Report: Mendocino triple junction
Well, I was on the road for 1.5 days (work party for the Community Village at the Oregon Country Fair). As I was driving home, there was a magnitude M 5.6 earthquake in coastal northern California. https://earthquake.usgs.gov/earthquakes/eventpage/nc73201181/executive I didn’t realize … Continue reading
Posted in cascadia, College Redwoods, earthquake, education, geology, gorda, HSU, humboldt, mendocino, mendocino, pacific, plate tectonics, San Andreas, strike-slip, subduction, Transform
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: Laytonville (northern CA)!
This morning there was another earthquake in northern CA between the San Andreas (SAF) and Maacama faults (MF). This region has been active for the past few years, with earthquakes in the M 3-4 range. Most recently, there was a … Continue reading
Posted in earthquake, education, geology, HSU, humboldt, mendocino, mendocino, pacific, plate tectonics, San Andreas, strike-slip, Transform
Earthquake Report: Mendocino fault!
Yesterday there was an earthquake along the eastern extension of the Mendocino fault system. This magnitude M = 4.1 earthquake (here is the USGS website for this earthquake) is a small magnitude, but it was widely felt. I was in … Continue reading
Posted in cascadia, earthquake, education, geology, gorda, HSU, humboldt, mendocino, mendocino, pacific, plate tectonics, strike-slip
Earthquake Report: Bartlett Springs fault system, Lake Pillsbury
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 … Continue reading
Posted in earthquake, education, geology, HSU, humboldt, mendocino, plate tectonics, San Andreas, strike-slip, Transform
Earthquake Report: Mendocino fault and Gorda plate!
We just had an earthquake along strike with the Mendocino fault zone. This region is seismically active and there were a number of MF earthquakes in 2015. Here is the USGS web page for today’s M = 4.5 MF earthquake. … Continue reading
Posted in cascadia, College Redwoods, earthquake, education, geology, gorda, HSU, humboldt, mendocino, mendocino, plate tectonics, strike-slip
Cascadia subduction zone: Tectonic Earthquakes of the Pacific Northwest
IRIS and the US Geological Survey have recently produced an educational video about tectonic earthquakes in the region of the US Pacific Northwest. The project was funded by the National Science Foundation. The Video YT link for the embedded video … Continue reading
Posted in cascadia, College Redwoods, earthquake, education, geology, gorda, HSU, humboldt, mendocino, mendocino, oregon, pacific, plate tectonics, strike-slip, subduction, Transform, tsunami
Stress Changes from Strike Slip Faults
One may ask what are the relations between the Mendocino fault (MF) and the Cascadia subduction zone (CSZ). Earthquakes on both fault systems are responding to the same plate motions. As the Gorda plate moves to the east, relative to … Continue reading