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 material in this post is also found on this page here.

Here is some background material about Jay and the talk.

Biographical Sketch
Outline of talk

This is the digital presentation

Here is the digital presentation (50 MB pptx). A draft presentation is in place and will be updated the day of the presentation.

This is a video of the presentation

Here I will post a video of the presentation.

Here are some sources of information about the Cascadia subduction zone

For the 315th anniversary of the most recent full rupture CSZ earthquake I put together a summary of our state of knowledge about the CSZ and that 1700 A.D. Jan. 26 earthquake. 2015.01.26
The USGS (and others) put together an educational video about the CSZ. I post this video and other supporting information online here: 2015.10.08

The Redwood Coast Tsunami Work Group Living on Shaky Ground: Preparing for the next Cascadia subduction zone earthquake and tsunami
USGS: Atwater et al. (2005): The Orphan Tsunami
USGS: Prehistoric Earthquakes along the Cascadia subduction zone: Goldfinger et al. (2012): The Turbidite Record
Tsunami Hazard Maps for the entire state of Oregon: Oregon Tsunami Hazard Mitigation Program
NOAA Center for Tsunami Research: Pacific Marine Environmental Laboratory

Here is an educational video about Cascadia subduction zone earthquakes and tsunamis.

Here is a tsunami hindcast for the Jan 26, 1700 Cascadia subduction zone megathrust earthquake that may have ruptured all the way south to Humboldt Bay. This is the download link for the embedded video below (35 MB mp4).

Here is an animation showing the Holocene record of earthquakes along the Cascadia subduction zone (Goldfinger et al., 2012).

Here is an animation of a Cascadia subduction zone earthquake generated tsunami. This is the download link for the embedded video below (15 MB mp4).

Here is an animation of the numerical simulation for tsunami inundation at Cannon Beach (Ecola Creek).
This was prepared by Rob Witter (Witter, 2008 ).

This is the digital file of the embedded video below (52 MB mp4)

Earthquake Reports

Elsewhere on my website, I summarize these reports by region here. I also post some of the earthquake reports associated with different regions of Cascadia here:

Gorda plate

2014.03.09 M 6.8 Gorda plate p-1
2014.03.23 M 6.8 Gorda plate p-2
2014.03.13 M 5.2 Gorda Rise
2015.11.18 M 3.2 Gorda plate

Blanco fracture zone

2015.06.01 M 5.8 Blanco fracture zone p-1
2015.06.01 M 5.8 Blanco fracture zone p-2 (animations)

Mendocino fault

2015.01.28 M 5.7 Mendocino fault
2015.11.01 M 4.3 Mendocino fault

References:

Atwater, B.F., Musumi-Rokkaku, S., Satake, K., Tsuju, Y., Eueda, K., and Yamaguchi, D.K., 2005. The Orphan Tsunami of 1700—Japanese Clues to a Parent Earthquake in North America, USGS Professional Paper 1707, USGS, Reston, VA, 144 pp.
Chaytor, J.D., Goldfinger, C., Dziak, R.P., and Fox, C.G., 2004. Active deformation of the Gorda plate: Constraining deformation models with new geophysical data: Geology v. 32, p. 353-356.
Goldfinger, C., Nelson, C.H., Morey, A., Johnson, J.E., Gutierrez-Pastor, J., Eriksson, A.T., Karabanov, E., Patton, J., Gràcia, E., Enkin, R., Dallimore, A., Dunhill, G., and Vallier, T., 2012. Turbidite Event History: Methods and Implications for Holocene Paleoseismicity of the Cascadia Subduction Zone, USGS Professional Paper # 1661F. U.S. Geological Survey, Reston, VA, 184 pp.
McCrory, P. A., Blair, J. L., Oppenheimer, D. H., and Walter, S. R., 2006. Depth to the Juan de Fuca slab beneath the Cascadia subduction margin; a 3-D model for sorting earthquakes U. S. Geological Survey
Nelson, A.R., Kelsey, H.M., Witter, R.C., 2006. Great earthquakes of variable magnitude at the Cascadia subduction zone. Quaternary Research 65, 354-365.
Patton, J. R., Goldfinger, C., Morey, A. E., Romsos, C., Black, B., Djadjadihardja, Y., and Udrekh, 2013. Seismoturbidite record as preserved at core sites at the Cascadia and Sumatra–Andaman subduction zones, Nat. Hazards Earth Syst. Sci., 13, 833-867, doi:10.5194/nhess-13-833-2013, 2013.
Plafker, G., 1972. Alaskan earthquake of 1964 and Chilean earthquake of 1960: Implications for arc tectonics in Journal of Geophysical Research, v. 77, p. 901-925.
Wang, K., Wells, R., Mazzotti, S., Hyndman, R. D., and Sagiya, T., 2003. A revised dislocation model of interseismic deformation of the Cascadia subduction zone Journal of Geophysical Research, B, Solid Earth and Planets v. 108, no. 1.
Witter, R.C., 200. Prehistoric Cascadia tsunami inundation and runup at Cannon Beach, Clatsop County, Oregon, Department of Geology and Mineral Industries, Open File Report O-08-12, 46 pp.