Jökull


Jökull - 01.12.2007, Page 53

Jökull - 01.12.2007, Page 53
Seismicity in Iceland during 2006 Figure 5. Earthquakes beneath Entujökull glacier in the western part of Mýrdalsjökull ice cap over a seven-day period in November 2006. Focal mechanisms suggest left-lateral movement along a northwest striking fault plane. – Skjálftavirkni undir Entujökli á sjö daga tímabili í nóvember 2006. Brotlausnir gefa til kynna vinstri handar sniðgengishreyfingu á norðvestlægu plani. Figure 6. Comparative b-value plots for northwest Vatnajökull and the Askja-Herðubreið region for the periods 2000–2004 and 2005–2006. Three seismic stations were installed in the Kárahnjúkar area (Figure 1) towards the end of 2004, two in November 2005 and one in September 2006. Note that the total number of events in the two-year period is much higher than in the five-year period. – b-gildi fyrir norðvestur Vatnajökul og Öskju-Herðubreiðarsvæðið fyrir tímabilin 2000–2004 og 2005–2006. Þrjár skjálftastöðvar voru settar upp á Kárahnjúkasvæðinu í lok árs 2004, tvær í nóvember 2005 og ein í september 2006. Athugið að heildarfjöldi skjálfta á tveggja ára tímabilinu er mun hærri en á fimm ára tímabilinu. JÖKULL No. 57 51
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