ANALYSIS OF MACROSEISMIC AND INSTRUMENTAL DATA FOR THE STUDY OF THE 19-NOVEMBER-1923 EARTHQUAKE IN THE ARAN VALLEY (CENTRAL PYRENEES)

Authors
SUSAGNA T ROCA A GOULA X BATLLO J
Citation
T. Susagna et al., ANALYSIS OF MACROSEISMIC AND INSTRUMENTAL DATA FOR THE STUDY OF THE 19-NOVEMBER-1923 EARTHQUAKE IN THE ARAN VALLEY (CENTRAL PYRENEES), Natural hazards, 10(1-2), 1994, pp. 7-17
Citations number
16
Categorie Soggetti
Metereology & Atmospheric Sciences","Geosciences, Interdisciplinary","Water Resources
Journal title
Natural hazards → ACNP
ISSN journal
0921030X
Volume
10
Issue
1-2
Year of publication
1994
Pages
7 - 17
Database
ISI
SICI code
0921-030X(1994)10:1-2<7:AOMAID>2.0.ZU;2-6
Abstract
The 19 November 1923 earthquake in the Aran Valley (Central Pyrenees), with observed maximum intensity I-max = VIII (MSK), has been studied through the compiling and reviewing of macroseismic information and co llecting and processing early seismograms. Analysis of macroseismic da ta gives a focal depth of h = 5 km and an anelastic attenuation coeffi cient alpha less than or equal to 10(-3) km(-1). Analysis of early ins trumental records allows the computation of estimate of magnitude (ML = 5.6) and seismic moment (M(o) = 1.1 x 10(17) N x m) which are consis tent with the values of I-o and h obtained from macroseismic data.