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Station: Oni-Base Camp

Code: SONB Country: Georgia

Network: temporay network in the epicentral area of the Racha earthquake

Coordinates: 42.573° N 43.436° E WGS84 Altitude: 790m above sealevel

Building Type: free-field

Instrument Location: basement

Geology: soft soil Vs,30: -

Operator: Russian Academy of Sciences, United Institute Physics of the Earth, Moscow D-242, Russia

Station Reference: Arefiev S., P. Smit, et al. (1991): The Racha (Georgia, USSR) earthquake of 29. April 1991:

Strong-motion data of selected aftershocks 3.May 1991-30.June 1991. Publication Series of

the Swiss Seismological Service, no. 105, ETH Zurich, Switzerland

Last Revision: 15.06.2000

Acceleration Time Histories:

total: 6 Dist. [km] PGA [m/s*s]

Earthquake Name Date Time M D Fault. Horizontal Vertical

aftershock of Racha earthquake 03.05.1991 20:19:39 5.36 Ms 24 - 0.509 0.161

aftershock of Racha earthquake 03.05.1991 23:41:01 4.43 Ms 12 - 0.345 0.104

aftershock of Racha earthquake 10.05.1991 20:30:44 4.5 Ms 13 - 0.764 0.139

aftershock of Racha earthquake 15.05.1991 14:28:52 4.23 Ms 8 - 0.645 0.155

aftershock of Racha earthquake 02.06.1991 06:10:48 3.7 Ms 13 - 0.113 0.033

aftershock of Racha earthquake 15.06.1991 00:59:20 6.24 Ms 51 47 0.353 0.15

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