FN Archimer Export Format
PT J
TI Earth's free oscillations recorded by free-fall OBS ocean-bottom seismometers at the Lesser Antilles subduction zone
BT 
AF BECEL, A.
   LAIGLE, Mireille
   DIAZ, J.
   MONTAGNER, J. -P.
   HIRN, A.
AS 1:1,2;2:1;3:2;4:1;5:1;
FF 1:;2:;3:;4:;5:;
C1 Seismology, Institut de Physique du Globe de Paris, UMR 7514 CNRS, Paris, France
   Institute of Earth Sciences ‘Jaume Almera,’ CSIC, Barcelona, Spain
C2 IPGP, FRANCE
   CSIC, SPAIN
IF 3.792
TC 8
UR https://archimer.ifremer.fr/doc/00185/29606/27971.pdf
LA English
DT Article
CR SISMANTILLES 2
BO L'Atalante
DE ;Lesser Antilles;broadband seismology;free oscillations;ocean bottom seismometers
AB Three unburied ocean bottom seismometers (OBS) equipped with Trillium 240 s broad-band seismometers recorded spheroidal free oscillations of the Earth out to periods over 1000 s period, for the M = 8.1, April 1, 2007 Solomon Islands earthquake. In contrast to broadband observatories of the global network that operate in quiet continental locations, these instruments were dropped on the several-km thick layer of sediments of the forearc and accretionary wedge of the Lesser Antilles subduction zone. Furthermore, a high ambient noise level due to the ocean surface infragravity waves is expected to cover the frequency band of Earth's normal modes band when recorded at these sites. In spite of these hostile environmental conditions, the frequency of clearly defined peaks of the Earth's normal modes were measured after the earthquake. This suggests that the recording of normal modes and long period waves can be extended to parts of the hitherto inaccessible ocean with currently available OBS technology.
PY 2011
PD DEC
SO Geophysical Research Letters
SN 0094-8276
VL 38
IS 24
UT 000298498800002
DI 10.1029/2011GL049533
ID 29606
ER

EF