Monthly Archives: October 2013

M 7.1 offshore Honshu Japan

Extensional earthquake in Pacific plate “up-dip” of the 11 March 2011 Tohoku-Oki earthquake. Here is the USGS page. Here is the moment tensor: Here is a map of the epicenter and Japan: Here is a map of the epicenter and … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, subduction, tsunami

Hookton Slough Coring

Tom Leroy and I went to my old coring site 01-BR-05 to make sure it was usable as a field trip stop for my class. We will be going here this coming Wednesday. Thanks Tom for helping me out. I … Continue reading

Posted in cascadia, College Redwoods, earthquake, education, geology, humboldt, plate tectonics, tsunami

M 6.4 Gulf California

Strike Slip in the Gulf. These transform faults connect the Cascadia subduction zone (CSZ) with the Middle America trench (MAT). Transform faults are strike skip fault systems that connect spreading mid oceanic spreading ridges. The northern end of this transform … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics

Alaska Earthquakes

The 1964 Great Alaska Earthquake occurred on Good Friday, March 27th. It and rocked the state with strong ground shaking for 4.5 minutes. At magnitude 9.2, it was the second largest quake ever recorded by seismometers. This animation shows the … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, subduction, tsunami

M 7.1 Panguna, Papua New Guinea

Here is a deep one (currently) and a big one. There may be a local tsunami, but there are no focal mechanisms yet. Ill add those when they become available. Here is a screenshot from the

Posted in cascadia, College Redwoods, earthquake, education, geology, plate tectonics, subduction, tsunami

Mw 7.1 Phillipines 2013.10.15

Fairly big earthquake. Sounds like it has caused some damage. Farly big earthquake. Sounds like it has caused some damage. Looks like a thrust or reverse earthquake, USGS poses the fault is in the Sunda crust. Fairly deep earthquake, but … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, subduction

Ken Aalto Talk on the Franciscan Today 10/14/13

Today at HSU Founders Hall Room 25 at 5PM  

Posted in cascadia, earthquake, education, geology, humboldt, plate tectonics, subduction

Mw 4.9 Trinidad 2013.10.11

All right! That was exciting and a little bit scary. Most all earthquakes scare me because I recognize they might get bigger or trigger a bigger one. This earthquake is most likely on a northeast striking strike-slip fault in the … Continue reading

Posted in cascadia, earthquake, education, geology, humboldt, plate tectonics, subduction