Global P, PP, and PKP wave microseisms observed from distant storms
Global P, PP, and PKP wave microseisms observed from distant storms
Microseisms are the continuous background vibrations of the Earth observed between earthquakes. Most microseism studies have focused on low frequency energy (0.05–0.5 Hz) propagating as surface waves, but in the microseism spectrum there is also energy that propagates as body waves (P-waves). Using array analysis on southern California stations we show that these body waves are generated in the ocean from distant storms and propagate deep within the Earth's mantle and core as P, PP and PKP phases. Comparisons with ocean wave hindcast data identify several distinct source regions in both the northern and southern hemispheres. Analyses of these body waves demonstrate that microseisms often have a strong P-wave component originating from distant locations.
icroseisms, beamforming, p, pp, pkp waves
L23306-[6pp]
Gerstoft, Peter
7d4f935a-fbf2-48e2-bb65-7bde8635c33b
Shearer, Peter M.
608a51f5-3369-49f1-adb4-4e565bef4b8c
Harmon, Nick
10d11a16-b8b0-4132-9354-652e72d8e830
Zhang, Jian
a63c1b0a-6207-4dea-b5a2-bdbcd5c2024f
December 2008
Gerstoft, Peter
7d4f935a-fbf2-48e2-bb65-7bde8635c33b
Shearer, Peter M.
608a51f5-3369-49f1-adb4-4e565bef4b8c
Harmon, Nick
10d11a16-b8b0-4132-9354-652e72d8e830
Zhang, Jian
a63c1b0a-6207-4dea-b5a2-bdbcd5c2024f
Gerstoft, Peter, Shearer, Peter M., Harmon, Nick and Zhang, Jian
(2008)
Global P, PP, and PKP wave microseisms observed from distant storms.
Geophysical Research Letters, 35 (23), .
(doi:10.1029/2008GL036111).
Abstract
Microseisms are the continuous background vibrations of the Earth observed between earthquakes. Most microseism studies have focused on low frequency energy (0.05–0.5 Hz) propagating as surface waves, but in the microseism spectrum there is also energy that propagates as body waves (P-waves). Using array analysis on southern California stations we show that these body waves are generated in the ocean from distant storms and propagate deep within the Earth's mantle and core as P, PP and PKP phases. Comparisons with ocean wave hindcast data identify several distinct source regions in both the northern and southern hemispheres. Analyses of these body waves demonstrate that microseisms often have a strong P-wave component originating from distant locations.
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e-pub ahead of print date: 9 December 2008
Published date: December 2008
Keywords:
icroseisms, beamforming, p, pp, pkp waves
Organisations:
Ocean and Earth Science
Identifiers
Local EPrints ID: 66068
URI: http://eprints.soton.ac.uk/id/eprint/66068
ISSN: 0094-8276
PURE UUID: bcee90dc-5fa9-4047-9f88-9e38ede6d8ce
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Date deposited: 27 Apr 2009
Last modified: 14 Mar 2024 02:55
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Author:
Peter Gerstoft
Author:
Peter M. Shearer
Author:
Jian Zhang
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