A peculiar cluster of microearthquakes on the eastern flank of Katla volcano, southern Iceland
A peculiar cluster of seismicity near the tip of Sandfellsjökull on the eastern flank of Katla volcano in southern Iceland has been analyzed in detail using data from a temporary seismic network. A total of 300 events were detected between July 2011 and August 2013, most of them from a swarm between...
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ftingv:oai:www.earth-prints.org:2122/15765 2023-05-15T16:48:46+02:00 A peculiar cluster of microearthquakes on the eastern flank of Katla volcano, southern Iceland Jeddi, Zeinab Sgattoni, Giulia Gudmundsson, Ólafur Tryggvason, Ari Lund, Björn #PLACEHOLDER_PARENT_METADATA_VALUE# 2017 http://hdl.handle.net/2122/15765 https://jokulljournal.is/2017-67.html en eng JOKULL /67 (2017) 0449-0576 http://hdl.handle.net/2122/15765 https://jokulljournal.is/2017-67.html restricted article 2017 ftingv 2022-12-27T23:26:23Z A peculiar cluster of seismicity near the tip of Sandfellsjökull on the eastern flank of Katla volcano in southern Iceland has been analyzed in detail using data from a temporary seismic network. A total of 300 events were detected between July 2011 and August 2013, most of them from a swarm between December 4th and 12th, 2011. The sparser permanent network detected a small fraction of these events, but also a larger swarm in November 2010. When seismic activity started in this area is uncertain because of changes in the detection capability of the network over time. The events are of low magnitude (-0.5 < ML < 0.5) and the b-value of their magnitude distribution is high (1.6±0.1). Based on their frequency content (4–25 Hz) and clear P and S arrivals, the events are classified as volcano-tectonic. Two multiplets probably with different source mechanism are identified in their population. The events locate at approximately 3.5 km depth. Most of them are tightly clustered according to double difference relative locations in a volume that is only about 400 m in diameter in all directions. Several events are scattered up to 800 m beneath this volume. There is some suggestion of elongate structure in the cluster with a NNE/SSW strike and a dip of 60 degrees. We argue that these events cannot be due to a glacial or a broad tectonic process. Possibly, a localized source of fluid pressure, e.g., a small magma body at depth may be the source of these events. Published 1-16 3T. Fisica dei terremoti e Sorgente Sismica 4V. Processi pre-eruttivi 5V. Processi eruttivi e post-eruttivi JCR Journal Article in Journal/Newspaper Iceland Katla Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Katla ENVELOPE(-19.062,-19.062,63.631,63.631) |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
description |
A peculiar cluster of seismicity near the tip of Sandfellsjökull on the eastern flank of Katla volcano in southern Iceland has been analyzed in detail using data from a temporary seismic network. A total of 300 events were detected between July 2011 and August 2013, most of them from a swarm between December 4th and 12th, 2011. The sparser permanent network detected a small fraction of these events, but also a larger swarm in November 2010. When seismic activity started in this area is uncertain because of changes in the detection capability of the network over time. The events are of low magnitude (-0.5 < ML < 0.5) and the b-value of their magnitude distribution is high (1.6±0.1). Based on their frequency content (4–25 Hz) and clear P and S arrivals, the events are classified as volcano-tectonic. Two multiplets probably with different source mechanism are identified in their population. The events locate at approximately 3.5 km depth. Most of them are tightly clustered according to double difference relative locations in a volume that is only about 400 m in diameter in all directions. Several events are scattered up to 800 m beneath this volume. There is some suggestion of elongate structure in the cluster with a NNE/SSW strike and a dip of 60 degrees. We argue that these events cannot be due to a glacial or a broad tectonic process. Possibly, a localized source of fluid pressure, e.g., a small magma body at depth may be the source of these events. Published 1-16 3T. Fisica dei terremoti e Sorgente Sismica 4V. Processi pre-eruttivi 5V. Processi eruttivi e post-eruttivi JCR Journal |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# |
format |
Article in Journal/Newspaper |
author |
Jeddi, Zeinab Sgattoni, Giulia Gudmundsson, Ólafur Tryggvason, Ari Lund, Björn |
spellingShingle |
Jeddi, Zeinab Sgattoni, Giulia Gudmundsson, Ólafur Tryggvason, Ari Lund, Björn A peculiar cluster of microearthquakes on the eastern flank of Katla volcano, southern Iceland |
author_facet |
Jeddi, Zeinab Sgattoni, Giulia Gudmundsson, Ólafur Tryggvason, Ari Lund, Björn |
author_sort |
Jeddi, Zeinab |
title |
A peculiar cluster of microearthquakes on the eastern flank of Katla volcano, southern Iceland |
title_short |
A peculiar cluster of microearthquakes on the eastern flank of Katla volcano, southern Iceland |
title_full |
A peculiar cluster of microearthquakes on the eastern flank of Katla volcano, southern Iceland |
title_fullStr |
A peculiar cluster of microearthquakes on the eastern flank of Katla volcano, southern Iceland |
title_full_unstemmed |
A peculiar cluster of microearthquakes on the eastern flank of Katla volcano, southern Iceland |
title_sort |
peculiar cluster of microearthquakes on the eastern flank of katla volcano, southern iceland |
publishDate |
2017 |
url |
http://hdl.handle.net/2122/15765 https://jokulljournal.is/2017-67.html |
long_lat |
ENVELOPE(-19.062,-19.062,63.631,63.631) |
geographic |
Katla |
geographic_facet |
Katla |
genre |
Iceland Katla |
genre_facet |
Iceland Katla |
op_relation |
JOKULL /67 (2017) 0449-0576 http://hdl.handle.net/2122/15765 https://jokulljournal.is/2017-67.html |
op_rights |
restricted |
_version_ |
1766038857555378176 |