Publication Date:
2022-02-18
Description:
After some centuries of subsidence, following
the AD 1538 Monte Nuovo last eruption, the
Campi Flegrei caldera has shown unrest
episodes since at least 1950. The first uplift
episode dates back to 1950–1952 and
amounted to 73 cm, without any report or
record of seismic activity. Two strong infla-
tion episodes occurred in 1970–1972 and
1982–1984. The first accompanied by moder-
ate low seismicity, with only few events felt
by the population, whereas the second was
accompanied by relatively intense swarms of
volcano-tectonic earthquakes, reaching up to
magnitude 4. The seismic activity caused
alarm in the population and a spontaneous
nightly evacuation of part of the town of
Pozzuoli (44,000 inhabitants). Since this last
episode, subsidence has been recorded for
several years, interrupted by some mini-uplift
events, lasting several weeks and accompa-
nied by seismic swarms of low-magnitude
volcano-tectonic events. In recent years, high
sensitivity instruments have been installed to
detect slow earthquake transients and other
mechanical/temperature low-intensity precur-
sory signals. Since late 2004 another moderate
uplift is occurring at very small rate, amount-
ing to about 1–2 cm/year, accompanied by
long-period events. This uplift is different
from the past mini-uplift events due to its
duration. This work summarises all seismic
and ground deformation data as well as the
models proposed to interpret these phenom-
ena, suggesting possible methods for detecting
precursors of future eruptive activity in the
area.
Description:
Published
Description:
257-282
Description:
1V. Storia eruttiva
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
book chapter
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