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Salvatore Gambino
Istituto Nazionale di Geofisica e Vulcanologia
Corresponding Author
ORCiD: https://orcid.org/0000-0001-8055-3059
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The Timpe Fault System (TFS) represents the source of shallow earthquakes that strike numerous towns and villages on Mt. Etna eastern flank. In the last 40 years, three destructive seismic events reached I0 = VIII EMS (heavily damaging) - in 1984 (October 25), 2002 (October 29) and 2018 (December 26). These events followed a few days after the occurrence of strong seismic swarms and the sudden acceleration of the eastern flank seaward. However, if the 2002 and 2018 events were caused by stress induced by eruptive dike propagation, in October 1984 no eruption occurred. In this work, parameters such as localization, cumulative seismic moment and hourly occurrence frequency of the 1984 seismic swarm, have been analyzed and shown to have typical values of Mt. Etna intrusive seismic swarms. This suggests that the 1984 episode may have been an aborted intrusive magma episode that triggered similar processes (long and powerful intrusions with acceleration of the eastern flank movement and destructive earthquakes), as in 2002 and 2018.
These three episodes suggest that an evaluation of some seismic parameters during future intrusive swarms may furnish indications of a possible re-activation of the TFS.
Keywords
Intrusive seismicity, flank dynamics, fault activation, destructive earthquakes
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CURRENT STATUS: Under Review
Version 1
Posted 22 Mar, 2021
No community comments so far
Review #1 received
Received 12 Apr, 2021
Reviewer #2 agreed
On 27 Mar, 2021
Reviewer #1 agreed
On 24 Mar, 2021
Review #? received
Received 24 Mar, 2021
Reviewers invited
Invitations sent on 23 Mar, 2021
Editor assigned
On 17 Mar, 2021
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On 17 Mar, 2021
Editor invited
On 17 Mar, 2021
First submitted
On 01 Mar, 2021
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This preprint is under consideration at Earth, Planets and Space. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Full paper
Salvatore Gambino
Istituto Nazionale di Geofisica e Vulcanologia
Corresponding Author
ORCiD: https://orcid.org/0000-0001-8055-3059
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 22 Mar, 2021
No community comments so far
Review #1 received
Received 12 Apr, 2021
Reviewer #2 agreed
On 27 Mar, 2021
Reviewer #1 agreed
On 24 Mar, 2021
Review #? received
Received 24 Mar, 2021
Reviewers invited
Invitations sent on 23 Mar, 2021
Editor assigned
On 17 Mar, 2021
Submission checks complete
On 17 Mar, 2021
Editor invited
On 17 Mar, 2021
First submitted
On 01 Mar, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
The Timpe Fault System (TFS) represents the source of shallow earthquakes that strike numerous towns and villages on Mt. Etna eastern flank. In the last 40 years, three destructive seismic events reached I0 = VIII EMS (heavily damaging) - in 1984 (October 25), 2002 (October 29) and 2018 (December 26). These events followed a few days after the occurrence of strong seismic swarms and the sudden acceleration of the eastern flank seaward. However, if the 2002 and 2018 events were caused by stress induced by eruptive dike propagation, in October 1984 no eruption occurred. In this work, parameters such as localization, cumulative seismic moment and hourly occurrence frequency of the 1984 seismic swarm, have been analyzed and shown to have typical values of Mt. Etna intrusive seismic swarms. This suggests that the 1984 episode may have been an aborted intrusive magma episode that triggered similar processes (long and powerful intrusions with acceleration of the eastern flank movement and destructive earthquakes), as in 2002 and 2018.
These three episodes suggest that an evaluation of some seismic parameters during future intrusive swarms may furnish indications of a possible re-activation of the TFS.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
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