Category Archives: geology

Earthquake Report: 1989 Loma Prieta!

Well, I prepared this report for the 30th anniversary of the 18 Oct 1989 Loma Prieta M 6.9 earthquake in central California, a.k.a. the World Series Earthquake (it happened during the 1989 World Series game at Candlestick Park in San … Continue reading

Posted in earthquake, education, geology, plate tectonics, San Andreas, San Francisco, strike-slip, Transform, Uncategorized

Earthquake Report: Sunda Strait, Indonesia

Around the beginning of the month, I was helping get a fundraiser prepared for a weekend concert series (audio crew for load in and strike; stage manager during the show). So, I was away from the computers when there was … Continue reading

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

Earthquake Report: Ridgecrest Update #3 Literature Review

I have reviewed a small portion of the literature for the tectonics of the northern Eastern California shear zone, Owens Valley fault, Garlock fault, etc. I have a basic knowledge of this region and have attended several Pacific Cell Friends … Continue reading

Posted in earthquake, education, geology, plate tectonics, San Andreas, strike-slip, Transform

Earthquake Report: Ridgecrest Update #2

Summary of Reports for the Ridgecrest Earthquake Sequence The original Earthquake Report for this widely felt sequence is here. The update #1 Earthquake Report for this widely felt sequence is here. The update #2 Earthquake Report for this widely felt … Continue reading

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

Earthquake Report: Halmahera, Indonesia

Well, yesterday I was preparing some updates to the Ridgecrest Earthquake following my field work with my colleagues at the California Geological Survey (where I work) and the U.S. Geological Survey. We spent the week documenting surface ruptures associated with … Continue reading

Posted in collision, earthquake, education, geology, Indonesia, plate tectonics, tsunami

Earthquake Report: Ridgecrest Update #1

Summary of Reports for the Ridgecrest Earthquake Sequence The original Earthquake Report for this widely felt sequence is here. The update #1 Earthquake Report for this widely felt sequence is here. The update #2 Earthquake Report for this widely felt … Continue reading

Posted in earthquake, education, geology, San Andreas, strike-slip

Earthquake Report: Ridgecrest, CA

Summary of Reports for the Ridgecrest Earthquake Sequence The original Earthquake Report for this widely felt sequence is here. The update #1 Earthquake Report for this widely felt sequence is here. The update #2 Earthquake Report for this widely felt … Continue reading

Posted in earthquake, education, geology, plate tectonics, strike-slip

Earthquake Report: Indonesia

I had been making an update to an earthquake report on a regionally experienced M 5.6 earthquake from coastal northern California when I noticed that there was a M 7.3 earthquake in eastern Indonesia. https://earthquake.usgs.gov/earthquakes/eventpage/us600044zz/executive This earthquake is in a … Continue reading

Posted in earthquake, education, Indonesia, New Zealand, pacific, plate tectonics, strike-slip, 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: Kermadec Trench

There was just an earthquake associated with the plate boundary that forms the Kermadec Trench, a deep oceanic trench that extends north from New Zealand, towards the Fiji Islands. https://earthquake.usgs.gov/earthquakes/eventpage/us6000417i/executive A minor tsunami (~25 cm in size) has been recorded … Continue reading

Posted in earthquake, education, geology, New Zealand, pacific, plate tectonics, subduction, tsunami