Excitation of long-period Rayleigh waves by large storms over the North Atlantic Ocean
Marine microseisms are known to be the major source of seismic noise. Generally, ground motions in the frequency range between 0.05 and 1 Hz induced by ocean waves are referred to as microseisms. In this article we show that in addition to such microseisms, strong storms over the North Atlantic Ocea...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_3042904 2023-05-15T17:29:55+02:00 Excitation of long-period Rayleigh waves by large storms over the North Atlantic Ocean Kurrle, D. Widmer-Schnidrig, R. 2010 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3042904 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2010.04723.x https://gfzpublic.gfz-potsdam.de/pubman/item/item_3042904 Geophysical Journal International info:eu-repo/semantics/article 2010 ftgfzpotsdam https://doi.org/10.1111/j.1365-246X.2010.04723.x 2022-09-14T05:55:44Z Marine microseisms are known to be the major source of seismic noise. Generally, ground motions in the frequency range between 0.05 and 1 Hz induced by ocean waves are referred to as microseisms. In this article we show that in addition to such microseisms, strong storms over the North Atlantic Ocean can also cause an increase of seismic noise at lower frequencies. As an example, a storm in 1999 October is analysed in detail. When the ocean waves caused by this storm hit the coastline, seismic Rayleigh waves with frequencies below 0.02 Hz were excited and could be observed globally. Using broad-band seismic networks in Germany and California as arrays, these Rayleigh waves can be traced back to the centre of the storm. Between 1999 and 2007, we identified more than 40 events with similar characteristics. Since it is expected that such storms also occur in other regions, it is likely that these storms together contribute significantly to the continuous excitation of the Earth's free oscillations, also known as the hum of the Earth. Article in Journal/Newspaper North Atlantic GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Geophysical Journal International 183 1 330 338 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Marine microseisms are known to be the major source of seismic noise. Generally, ground motions in the frequency range between 0.05 and 1 Hz induced by ocean waves are referred to as microseisms. In this article we show that in addition to such microseisms, strong storms over the North Atlantic Ocean can also cause an increase of seismic noise at lower frequencies. As an example, a storm in 1999 October is analysed in detail. When the ocean waves caused by this storm hit the coastline, seismic Rayleigh waves with frequencies below 0.02 Hz were excited and could be observed globally. Using broad-band seismic networks in Germany and California as arrays, these Rayleigh waves can be traced back to the centre of the storm. Between 1999 and 2007, we identified more than 40 events with similar characteristics. Since it is expected that such storms also occur in other regions, it is likely that these storms together contribute significantly to the continuous excitation of the Earth's free oscillations, also known as the hum of the Earth. |
format |
Article in Journal/Newspaper |
author |
Kurrle, D. Widmer-Schnidrig, R. |
spellingShingle |
Kurrle, D. Widmer-Schnidrig, R. Excitation of long-period Rayleigh waves by large storms over the North Atlantic Ocean |
author_facet |
Kurrle, D. Widmer-Schnidrig, R. |
author_sort |
Kurrle, D. |
title |
Excitation of long-period Rayleigh waves by large storms over the North Atlantic Ocean |
title_short |
Excitation of long-period Rayleigh waves by large storms over the North Atlantic Ocean |
title_full |
Excitation of long-period Rayleigh waves by large storms over the North Atlantic Ocean |
title_fullStr |
Excitation of long-period Rayleigh waves by large storms over the North Atlantic Ocean |
title_full_unstemmed |
Excitation of long-period Rayleigh waves by large storms over the North Atlantic Ocean |
title_sort |
excitation of long-period rayleigh waves by large storms over the north atlantic ocean |
publishDate |
2010 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_3042904 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geophysical Journal International |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2010.04723.x https://gfzpublic.gfz-potsdam.de/pubman/item/item_3042904 |
op_doi |
https://doi.org/10.1111/j.1365-246X.2010.04723.x |
container_title |
Geophysical Journal International |
container_volume |
183 |
container_issue |
1 |
container_start_page |
330 |
op_container_end_page |
338 |
_version_ |
1766125165968621568 |