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| Titel |
A seismic swarm near Neshkan, Chukotka, northeastern Russia, and implications for the boundary of the Bering plate |
| VerfasserIn |
K. G. Mackey, K. Fujita, B. M. Sedov, L. V. Gounbina, S. Kurtkin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1868-4556
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| Digitales Dokument |
URL |
| Erschienen |
In: Geology, geophysics and tectonics of Northeastern Russia: a tribute to Leonid Parfenov ; Nr. 4 (2009-09-17), S.261-271 |
| Datensatznummer |
250001451
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| Publikation (Nr.) |
 copernicus.org/smsps-4-261-2009.pdf |
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| Zusammenfassung |
| A seismic swarm lasting over two years occurred near the village of Neshkan,
Chukotka, far northeastern Russia, beginning with a ML, 4.2 (4.1 mb)
earthquake on 9 December 2002. The swarm generated considerable anxiety among
the local populace and authorities. Two temporary seismic stations were
deployed during the latter part of September 2003, and recorded over
150 events with magnitudes up to 3.0. Eighteen locatable events appear to
form a northeast striking linear trend, parallel to other seismicity trends
in Chukotka, extending 20 km to the southwest from the village. We interpret
this trend as a previously unknown fault. A small pond located ~1 km
west of the village drained and some apparent surface deformation was
observed over the course of the earthquake sequence. Relocation of historic
seismicity in the region shows that a magnitude 6.0 in 1996 may have ruptured
an adjacent fault segment. Other, less well located but larger, teleseismic
events earlier in the 20th century may also have occurred on or near this
fault. The seismicity is consistent a proposed region of transtension along
the northern boundary of a Bering plate. |
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