Seismicity of Ruapehu Volcano recorded during the 1994 seismometer deployment

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Hurst, A.W.; McGinty, P.J. 1995 Seismicity of Ruapehu Volcano recorded during the 1994 seismometer deployment Institute of Geological & Nuclear Sciences science report 95/45 31 p.

Abstract: A two month deployment of 14 broadband seismographs around Ruapehu in early 1994 recorded seismicity associated with the active vent of Ruapehu, as well as tectonic earthquakes around the Tongariro National Park volcanoes. During the deployment, 2 extra stations were also added to the existing station short-period seismograph network around Ruapehu. High-frequency volcano-tectonic earthquakes and bursts of volcanic tremor were both found to have sources under Crater Lake. The shallow crustal seismicity under these volcanoes shows a transition from the Taupo Volcanic Zone environment to the north, where all events were shallower than about 10 km, to a deeper crustal seismicity to the south. Long-period events recorded during this deployment will be discussed elsewhere. (auth)