The volcanoseismic crisis of 1996-97 in Nisyros, SE Aegean Sea, Greece

After a repose time of several years, intense, shallow seismic activity started at the end of 1995 in the volcanic region of Nisyros island. By the end of October 1997, hundreds of shocks had been recorded, the largest one being that of 27 August 1997 with Ms = 5.3. The activity is highly clustered...

Full description

Saved in:
Bibliographic Details
Published in:Terra nova (Oxford, England) England), 1998-05, Vol.10 (3), p.151-154
Main Authors: Papadopoulos, Gerassimos A, Sachpazi, Maria, Panopoulou, Georgia, Stavrakakis, Georgios
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:After a repose time of several years, intense, shallow seismic activity started at the end of 1995 in the volcanic region of Nisyros island. By the end of October 1997, hundreds of shocks had been recorded, the largest one being that of 27 August 1997 with Ms = 5.3. The activity is highly clustered in space and time, while the b‐value of the magnitude‐frequency relation was found equal to 1.67. Similar b‐values were determined from Nisyros seismicity registered between 1911 and 1980 and from a 1997 microearthquake dataset. These properties seem to be a characteristic of the region, rather than precursor of a forthcoming eruption and make Nisyros similar to other large calderas of the Earth where the episodic unrest with local swarm‐like earthquake sequences separated by months or years is a typical pattern that do not culminate in a volcanic eruption.
ISSN:0954-4879
1365-3121
DOI:10.1046/j.1365-3121.1998.00184.x