Jarðskjálftar á Íslandi

Larger earthquakes in Iceland occur mainly in two zones, a narrow E-W trending zone in S-Iceland and 75 km broad zone off the northern coast. Destruction and ground displacement due to the earthquake sequences of J784 (Ms 7.5-8), 1896 Mg 7-7.5) and 1912 (Ms 7) are described. Considerable seismic act...

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Bibliographic Details
Main Author: Björnsson, Sveinbjörn
Other Authors: Raunvísindastofnun (HÍ), Science Institute (UI), Verkfræði- og náttúruvísindasvið (HÍ), School of Engineering and Natural Sciences (UI), Háskóli Íslands, University of Iceland
Format: Article in Journal/Newspaper
Language:Icelandic
Published: Hið íslenzka náttúrufræðifélag 1976
Subjects:
Jarðskjálftar
Ísland
Gosbelti
Jarðfræði
Jarðeðlisfræði
Jarðskjálftarannsóknir
Seismic belts
Iceland
Historical earthquakes
South Iceland earthquakes
Earthquake intensity
Damaging earthquakes
Askja
Heimaey
Katla
Lakagígar
Mývatn
Sveinagjá
Online Access:https://hdl.handle.net/20.500.11815/1323
Description
Summary:Larger earthquakes in Iceland occur mainly in two zones, a narrow E-W trending zone in S-Iceland and 75 km broad zone off the northern coast. Destruction and ground displacement due to the earthquake sequences of J784 (Ms 7.5-8), 1896 Mg 7-7.5) and 1912 (Ms 7) are described. Considerable seismic activity is observed within the active volcanic zones. The earthquakes occur mainly as swarms of magnitude less than Ms 5. Volcanic eruptions are generally preceded by swarms of earthquakes. Examples of such premonitory earthquakes are given for the eruption of Heimaey 1973, Katla 1625, Lakagígar 1783, Mývatn Fires 1724-1729, Askja and Sveinagjá 1875.

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