Earthjay.com Website Review

the center, body, and range of technically defensible interpretations. the cbd of tdi. well, the usgs updated their earthquake mechanism (moment tensor) to be more steeply dipping, showing a more vertical fault possibly. this makes more sense given the historic earthquakes in this region and our knowledge of the history of this complicated plate boundary. the usgs also updated their model of shaking intensity (mmi) and revised the magnitude to m =7.3 (though i keep m = 7.4 in these reports to avoid i present a larger scale map with more historic earthquake mechanisms below. these historic mechanisms reveal something about how the pacific plate subducts beneath the okhotsk plate (part of north america). read more the m = 7.4 earthquake from yesterday clearly ruptured the aleutian fracture zone (afz), which is part of the bering kresla shear zone. there is a series of aftershocks that plot to the southwest of the mainshock, but these are mislocated. the m =7.4 was originally located to the southwest also (off of the fault), but has since been relocated. so, i suspect that these aftershocks could be relocated also, if someone were to work on them (e.g. double difference an*lysis). the 1978.03.03 m 6.2 earthquake is a great an*logy for this m 7.4 as it is in the same location and has a nice right-lateral strike slip focal mechanism. the relative motion between the pacific plate and north america plate here is parallel to the plate boundary, giving rise to this shear we can see strike slip earthquakes west of the trench (1984.11.01 and 1986.05.02). further to the west, there are some earthquakes that show the convergence as*ociated with this subduction margin (1983.01.09, 1982.11.21, 1997.12.05). the aleutian fracture zone exists within the pacific plate as it dives beneath the okhotsk plate,as evidenced by the 2004.04.14 m = 6.2 earthquake. below is my interpretive poster for this earthquake i plot the seismicity from the past month, with color representing