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Earthquakes in the 2008 Mogul-Somersett sequence have been relocated with application HYPODD (Waldhauser & Ellsworth, 2000). This relocation set includes 987 of the best located events; only arrival time data are used.
Two sub-parallel NW striking faults define the activity within the central part of the sequence. The western most structure is approximately 2 km in length and is located directly below Mogul and the southern most Somersett areas. This structure is confined to shallower depths and includes the initial earthquake activity of the sequence. The second primary NW striking structure is east of the initial faulting activity, extends to about 5 km depth, and is at least 5 km in length. A later developing cluster of earthquakes NE of these two sub-parallel feature may be associated with a NE striking conjugate fault at the NW extent of the two sub-parallel fault systems that define the central part of the sequence. Earthquake activity to the NW of the central zone of seismicity may be directly associated with the structure that defines the eastern most primary NW striking fault, suggesting that the structure may strike more westerly at its NW extent as defined by the seismicity. Earthquakes have also been located as far south as the Caughlin Ranch area of west Reno. Clearly, there is more than one geologic structure involved in the Mogul-Somersett sequence. Additional analysis of the sequence will better define these active structures.
Originally posted by damntheptb
reply to post by JustMike
i am sure they are planned waaaaay in advance, it is a yearly exercise, they just picked reno to host it this year...Just ironic they are doing a drill for a 7.1 and we are going through a massive swarm