Research in Regional Seismic Monitoring

• Main Authors: Ringdal, F., Kremenetskaya, E., Asming, V., Kvaerna, T., Mykkeltveit, S., Faleide, J. I., Schweitzer, J.
• Other Authors: NORWEGIAN SEISMIC ARRAY (NORSAR) KJELLER
• Format: Text
• Language: English
• Published: 2001
• Subjects: Seismology; Explosions; *ARCTIC REGIONS; *SEISMOLOGY; *EXPLOSIONS; *EARTHQUAKES; MONITORING; SURFACE TRUTH; CALIBRATION; NORWAY; DETECTION; SYMPOSIA; POSITION(LOCATION); DATA BASES; SEISMIC WAVES; ROCKBURSTS; FOREIGN REPORTS; Amderma; Arctic; Barentsburg; Khibiny; Kola Peninsula; Norway; Fennoscandian; kola peninsula; ural mountains; Vorkuta; Spitsbergen
• Online Access: http://www.dtic.mil/docs/citations/ADA529621; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA529621

This project represents a continuing effort to use data from the regional networks operated by NORSAR and the Kola Regional Seismological Centre (KRSC) to assess the seismicity and characteristics of regional phases of the European Arctic. Recently, seismic instrumentation has been installed inside the mines in the Khibiny Massif of the Kola peninsula in order to provide origin times of the seismic events as well as to contribute to additional validation of the location accuracy. We are now planning to expand this effort by collecting similar ground truth information for other mines in the Kola Peninsula, Spitsbergen and NW Russia. We present some initial ground truth information from rockbursts/earthquakes in a coal mine in Spitsbergen (Barentsburg). A 3-component digital seismometer system was installed in this mine in November 2000, and we present results of locating these rockbursts. The largest of these events are well recorded by the International Monitoring System (IMS) arrays SPITS and ARCES, and can therefore be useful for IMS calibration purposes. Another area of interest for calibration is the northern Ural Mountains, where there is significant mining activity. The Amderma station, which is operated by KRSC, routinely detects a large number of mining explosions in mines near Vorkuta, and examples of such event recordings are presented. The largest of these events are also observed at the Fennoscandian arrays, especially ARCES, although they are seldom large enough to be included in the Reviewed Event Bulletin (REB), which currently requires P-detection by at least three primary IMS stations. Nevertheless, the detection, location and screening of such small events, even when observed by only a single station, are of interest in a global monitoring situation. The provision of ground truth of selected explosions and/or rockbursts in this area will help in calibrating the ARCES array (and possibly other stations) for such monitoring purpose. Presented at the Seismic Research Review (23rd): Worldwide Monitoring of Nuclear Explosions, held in Jackson Hole, WY on 2-5 Oct 2001. Published in the proceedings of the conference, p315-323, 2001. Prepared in cooperation with Kola Regional Seismological Center. U.S. Government or Federal Rights. The original document contains color images.