Publication Date:
2017-04-04
Description:
During his trip on the Beagle, Charles Darwin
wrote about the eruptions associated with the Concepci´on
earthquake of 1835. A later survey by Lorenzo Casertano,
following the great 1960 Chilean earthquake, identified some
unclear evidence of a link between eruptions and the seismic
event, although some reservations were also raised. Using
data available in 2006 in the Smithsonian Institution
Catalogue of volcanic eruptions, Scalera revealed grounded
evidence that South-American Wadati-Benioff zone earthquakes
of magnitudes greater than 8.4 are associated with
an increased rate of volcanic eruptions, but it was still impossible
to determine a causal link between the two phenomena.
An average return period of about 50 yr was deducible
from the data for the time window 1800–1999. After
2006, the Smithsonian Institution’s effort to improve our
knowledge of this region has greatly increased the completeness
of the catalogue, adding the eruptions from the 2000–
2010 interval, together with 50% more new entries in the
list of Andean volcanoes. The great Chilean Maule earthquake
of 27 February 2010 (M = 8.8), occurring exactly five
decades after the 1960 event, provided an occasion to reanalyse
this updated database. The results suggest a preferential
causal eruptions-earthquake relationship, but additional future
volcano-seismic events should be studied to arrive at
a definitive conclusion, within the perspective of using this
phenomenon for Civil Protection. The possible correlation of
South American volcano-seismic events with the Markowitz
oscillation of the Polar Motion is another good reason for
trying to establish an integrated geodynamic explanation.
Description:
Published
Description:
89-103
Description:
1.5. TTC - Sorveglianza dell'attività eruttiva dei vulcani
Description:
3.3. Geodinamica e struttura dell'interno della Terra
Description:
5.3. TTC - Banche dati vulcanologiche
Description:
JCR Journal
Description:
open
Keywords:
Volcano-seismic correlation
;
Volcano-seismic risk
;
Polar Motion and volcano-seismic events
;
Expanding Earth
;
04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processes
;
04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology
;
04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
;
05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions
;
05. General::05.08. Risk::05.08.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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