![]() The color marks the depth below the surface to the hypocenter (the colored depth scale is measured relative to sea level, in units of kilometers).Īlmost all the earthquakes occurred along the axis of the Cayuga valley: under Cayuga Lake south of the lake under the City of Ithaca under South Hill. The size of the circle marks the magnitude of each earthquake. The map shows the “catalog” of all earthquakes (circles) that occurred within the boundaries of the seismic network during those two years (locations of the seismometers are marked by black triangles). In years 20 there was much less construction within the area of the seismometer network, which simplified analysis of the seismic waves. ![]() To reduce the noise registered on the seismic records, some of the CorNET21seismometers are buried 2 feet (or 0.5 meters) below ground surface, and several are installed 30 feet (or 10 meters) below the ground surface. During 2019, the network recorded a very large amount of “seismic activity” caused by construction projects, along with some earthquakes located far away from Tompkins County and some small earthquakes within the boundaries of the seismic network. ![]() This array of 17 stations covers a bigger footprint – about three times as broad an area. CorNET21’s data are collected and analyzed through a contract with an independent company, Weston Geophysical Group. CorNET21 was installed in July 2019 and is expected to be in operation at least through 2022.
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