Jarðskjálftar á Íslandi

Titill:	Jarðskjálftar á Íslandi
Höfundur:	Björnsson, Sveinbjörn 1 höfundar Sýna færri höfunda
Útgáfa:	1976
Tungumál:	Íslenska
Umfang:	110-133
Háskóli/Stofnun:	Háskóli Íslands University of Iceland
Svið:	Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI)
Deild:	Raunvísindastofnun (HÍ) Science Institute (UI)
Birtist í:	Náttúrufræðingurinn;45(2)
ISSN:	0028-0550
Efnisorð:	Jarðskjálftar; Ísland; Gosbelti; Jarðfræði; Jarðeðlisfræði; Jarðskjálftarannsóknir; Seismic belts; Iceland; Historical earthquakes; South Iceland earthquakes; Earthquake intensity; Damaging earthquakes
URI:	https://hdl.handle.net/20.500.11815/1323
Skoða fulla færslu
Útdráttur: 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.