Morphotectonic features reveal recent seismic activity on normal faults on Crete allowing slip-rates, palaeoearthquake magnitudes and earthquake recurrence intervals to be inferred. The studied faults show major escarpments (100s m high, 10s km long), separating uplifted Mesozoic rocks from Quaternary deposits. During Holocene, slip-rates out-paced erosion/sedimentation rates and 5-15 m high fresh scarps formed at the base of the major escarpments. Based on our field observations and following empirical relationships between magnitude, surface rupture length and maximum co-seismic vertical displacement, it was possible to infer all principal seismotectonic parameters for the investigated faults. Long-term throw-rates range between 0.4 and 1.2 mm/a, maximum expected magnitudes between 6.3 and 6.6 (or 6.6-6.9, considering the worst case scenario), while mean recurrence intervals range between >200 and 1000 years. These estimates are in good agreement with the historical and instrumental seismicity allowing to improve seismic hazard estimates in Crete.

Multi-seismic cycle deformation rates from Holocene normal fault scarps on Crete (Greece).

CAPUTO, Riccardo;
2006

Abstract

Morphotectonic features reveal recent seismic activity on normal faults on Crete allowing slip-rates, palaeoearthquake magnitudes and earthquake recurrence intervals to be inferred. The studied faults show major escarpments (100s m high, 10s km long), separating uplifted Mesozoic rocks from Quaternary deposits. During Holocene, slip-rates out-paced erosion/sedimentation rates and 5-15 m high fresh scarps formed at the base of the major escarpments. Based on our field observations and following empirical relationships between magnitude, surface rupture length and maximum co-seismic vertical displacement, it was possible to infer all principal seismotectonic parameters for the investigated faults. Long-term throw-rates range between 0.4 and 1.2 mm/a, maximum expected magnitudes between 6.3 and 6.6 (or 6.6-6.9, considering the worst case scenario), while mean recurrence intervals range between >200 and 1000 years. These estimates are in good agreement with the historical and instrumental seismicity allowing to improve seismic hazard estimates in Crete.
2006
Caputo, Riccardo; Monaco, C.; Tortorici, L.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/494275
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 42
  • ???jsp.display-item.citation.isi??? 39
social impact