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- 2015 Earthquake Summary Page<\/a><\/li>\n
- 2016 Earthquake Summary Page<\/a><\/li>\n
- 2017 Earthquake Summary Page<\/a><\/li>\n<\/ul>\n<\/ul>\n
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- Here are the Cascadia summaries:<\/li>\n
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- 2016 Cascadia Earthquake Summary Page<\/a><\/li>\n
- 2017 Cascadia Earthquake Summary Page<\/a><\/li>\n<\/ul>\n<\/ul>\n
Below is my CSZ summary poster for this earthquake year<\/strong><\/font><\/h2>\n
I present larger scale maps for the northern and southern portions of the CSZ on the left side of this interpretive poster.<\/p>\n
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- In the upper right corner is a map of the Cascadia subduction zone (CSZ) and regional tectonic plate boundary faults. This is modified from several sources (Chaytor et al., 2004; Nelson et al., 2004).<\/li>\n
- To the left of the CSZ map, I include generalized fault map of northern California from Wallace (1990).<\/li>\n
- In the lower right corner I include a diagram from Wallace (1990) that shows the evolution o fhte North America-Pacific plate boundary since the past 29 million years (Ma).<\/li>\n
- To the right of this large scale map, I include the Earthquake Shaking Potential map from the state of California. This is a probabilistic seismic hazard map, basically a map that shows the likelihood that there will be shaking of a given amount over a period of time. More can be found from the California Geological Survey here<\/a>. I place a blue star in the approximate location of today’s earthquake.<\/li>\n<\/ul>\n
\n![\"\"](\"http:\/\/earthjay.com\/earthquakes\/2017_summary_csz\/2017_csz_summary.jpg\")
<\/a><\/p>\n- \n
- Here is the same map, but with USGS seismicity from 1917-2017 with magnitudes M \u2265 2.5. Note how the seismicity along the northern CSZ does not correspond well to the mapped structures. It is as if the Queen Charlotte fault is busting through from the north, as the plate boundary organizes itself.<\/li>\n<\/ul>\n
\n![\"\"](\"http:\/\/earthjay.com\/earthquakes\/2017_summary_csz\/2017_csz_summary_19172017.jpg\")
<\/a><\/p>\n
\nCascadia subduction zone: General Overview<\/strong> <\/h2>\n
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- Cascadia’s 315th Anniversary 2015.01.26<\/a><\/li>\n
- Cascadia’s 316th Anniversary 2016.01.26<\/a><\/li>\n
- 1992.04.25 M 7.1 Cape Mendocino<\/a> 25 year remembrance<\/li>\n
- 1992.04.25 M 7.1 Cape Mendocino 25 Year Remembrance Event Page<\/a><\/li>\n
- Earthquake Information about the CSZ 2015.10.08<\/a><\/li>\n<\/ul>\n
2017 Cascadia subduction zone Earthquake Report pages<\/strong> <\/h2>\n
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- 2017.01.07 M 5.7 Explorer plate<\/a><\/li>\n
- 2017.03.06 M 4.0 Cape Mendocino<\/a><\/li>\n
- 2017.06.11 M 3.5 Gorda or NAP?<\/a><\/li>\n
- 2017.07.28 M 5.1 Gorda plate (Cascadia)<\/a><\/li>\n
- 2017.09.22 M 5.7 Mendocino fault<\/a><\/li>\n
- 2017.12.14 M 4.3 Laytonville<\/a><\/li>\n<\/ul>\n
Earthquake Background Materials<\/h2>\n
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- There are three types of earthquakes, strike-slip, compressional (reverse or thrust, depending upon the dip of the fault), and extensional (normal). Here is are some animations of these three types of earthquake faults. Many of the earthquakes people are familiar with in the Mendocino triple junction region are either compressional or strike slip. The following three animations are from IRIS<\/a>.<\/li>\n<\/ul>\n
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Strike Slip:<\/h3>\n
- 2017.03.06 M 4.0 Cape Mendocino<\/a><\/li>\n
- Cascadia’s 316th Anniversary 2016.01.26<\/a><\/li>\n
- Cascadia’s 315th Anniversary 2015.01.26<\/a><\/li>\n
- Here is the same map, but with USGS seismicity from 1917-2017 with magnitudes M \u2265 2.5. Note how the seismicity along the northern CSZ does not correspond well to the mapped structures. It is as if the Queen Charlotte fault is busting through from the north, as the plate boundary organizes itself.<\/li>\n<\/ul>\n
I include some inset figures in the poster.<\/h2>\n
- 2017 Cascadia Earthquake Summary Page<\/a><\/li>\n<\/ul>\n<\/ul>\n
- 2016 Cascadia Earthquake Summary Page<\/a><\/li>\n
- 2016 Earthquake Summary Page<\/a><\/li>\n