EVALUATION OF THE IMPACT OF MAJOR EARTHQUAKES ON EXCITING LONG PERIOD FREE-EARTH LITHOSPHERIC OSCILLATIONS, ATMOSPHERIC-IONOSPHERIC PERTRUBATIONS, AND FAR-FIELD TSUNAMI-LIKE WATER LEVEL FLUCTUATIONS

The whole Earth resonates like a bell with normal modes of resonance at distinct frequencies. When extremely large earthquakes strike, the Earth’s free oscillations are excited. These excited, long period, enhanced earth oscillations have frequencies which have a tendency to resonate over long perio...

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Main Author: George Pararas-Carayannis
Format: Article
Language:English
Published: Tsunami Society International 2020-11-01
Series:Science of Tsunami Hazards
Subjects:
Online Access:http://www.tsunamisociety.org/394Pararas-Carayannis.pdf
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spelling doaj-ec4b0e56891b4217ae90498a4473e7862021-04-02T20:16:12ZengTsunami Society InternationalScience of Tsunami Hazards8755-68392020-11-01394254278EVALUATION OF THE IMPACT OF MAJOR EARTHQUAKES ON EXCITING LONG PERIOD FREE-EARTH LITHOSPHERIC OSCILLATIONS, ATMOSPHERIC-IONOSPHERIC PERTRUBATIONS, AND FAR-FIELD TSUNAMI-LIKE WATER LEVEL FLUCTUATIONSGeorge Pararas-Carayannis0Tsunami Society InternationalThe whole Earth resonates like a bell with normal modes of resonance at distinct frequencies. When extremely large earthquakes strike, the Earth’s free oscillations are excited. These excited, long period, enhanced earth oscillations have frequencies which have a tendency to resonate over long periods of time after a major earthquake. The Great Sumatra-Andaman Islands Earthquake of 26 December 2004 - the largest event in the last half century – was the first event in the Moment Magnitude (Mw 9) category to be recorded with modern digital instruments. The earthquake generated distinct stronger free oscillations of the Earth’s lithosphere. Also, further coupling of these oscillations reportedly resulted in distinct atmospheric as well as ionospheric perturbations of certain modalities and frequencies. The present paper examines whether the excited stronger "spheroidal normal modes" of free earth oscilations could have contributed as well to tsunami generation enhancement, and to the lasting and persistent tidal oscillations that were recorded in the Andaman Sea and elsewhere. The present review further examines the efficiency of coupling of excited stronger solid free earth oscillations with the ocean, and analyzes whether these could have contributed significantly to the destructiveness of the tsunami that was observed in the Indian Ocean, or to unusual far-field water level fluctuations recorded by tide gauges in the Pacific and Atlantic Oceans – which cannot be supported by calculated tsunami travel times. Additionally to the 2004 event, other major earthquakes, volcanic and meteorological events are similarly examined as to their possible excitation of free Earth oscillations or coupling with the sea surface and the atmosphere, to generate far-field, tsunami-like sea level fluctuations or meteotsunamis.http://www.tsunamisociety.org/394Pararas-Carayannis.pdfsurface seismic wavesfree earth oscillationstsunamisearthquake source observations26 december 2004 earthquakespherodial / toroidal modesrayleigh & love wave interactions
collection DOAJ
language English
format Article
sources DOAJ
author George Pararas-Carayannis
spellingShingle George Pararas-Carayannis
EVALUATION OF THE IMPACT OF MAJOR EARTHQUAKES ON EXCITING LONG PERIOD FREE-EARTH LITHOSPHERIC OSCILLATIONS, ATMOSPHERIC-IONOSPHERIC PERTRUBATIONS, AND FAR-FIELD TSUNAMI-LIKE WATER LEVEL FLUCTUATIONS
Science of Tsunami Hazards
surface seismic waves
free earth oscillations
tsunamis
earthquake source observations
26 december 2004 earthquake
spherodial / toroidal modes
rayleigh & love wave interactions
author_facet George Pararas-Carayannis
author_sort George Pararas-Carayannis
title EVALUATION OF THE IMPACT OF MAJOR EARTHQUAKES ON EXCITING LONG PERIOD FREE-EARTH LITHOSPHERIC OSCILLATIONS, ATMOSPHERIC-IONOSPHERIC PERTRUBATIONS, AND FAR-FIELD TSUNAMI-LIKE WATER LEVEL FLUCTUATIONS
title_short EVALUATION OF THE IMPACT OF MAJOR EARTHQUAKES ON EXCITING LONG PERIOD FREE-EARTH LITHOSPHERIC OSCILLATIONS, ATMOSPHERIC-IONOSPHERIC PERTRUBATIONS, AND FAR-FIELD TSUNAMI-LIKE WATER LEVEL FLUCTUATIONS
title_full EVALUATION OF THE IMPACT OF MAJOR EARTHQUAKES ON EXCITING LONG PERIOD FREE-EARTH LITHOSPHERIC OSCILLATIONS, ATMOSPHERIC-IONOSPHERIC PERTRUBATIONS, AND FAR-FIELD TSUNAMI-LIKE WATER LEVEL FLUCTUATIONS
title_fullStr EVALUATION OF THE IMPACT OF MAJOR EARTHQUAKES ON EXCITING LONG PERIOD FREE-EARTH LITHOSPHERIC OSCILLATIONS, ATMOSPHERIC-IONOSPHERIC PERTRUBATIONS, AND FAR-FIELD TSUNAMI-LIKE WATER LEVEL FLUCTUATIONS
title_full_unstemmed EVALUATION OF THE IMPACT OF MAJOR EARTHQUAKES ON EXCITING LONG PERIOD FREE-EARTH LITHOSPHERIC OSCILLATIONS, ATMOSPHERIC-IONOSPHERIC PERTRUBATIONS, AND FAR-FIELD TSUNAMI-LIKE WATER LEVEL FLUCTUATIONS
title_sort evaluation of the impact of major earthquakes on exciting long period free-earth lithospheric oscillations, atmospheric-ionospheric pertrubations, and far-field tsunami-like water level fluctuations
publisher Tsunami Society International
series Science of Tsunami Hazards
issn 8755-6839
publishDate 2020-11-01
description The whole Earth resonates like a bell with normal modes of resonance at distinct frequencies. When extremely large earthquakes strike, the Earth’s free oscillations are excited. These excited, long period, enhanced earth oscillations have frequencies which have a tendency to resonate over long periods of time after a major earthquake. The Great Sumatra-Andaman Islands Earthquake of 26 December 2004 - the largest event in the last half century – was the first event in the Moment Magnitude (Mw 9) category to be recorded with modern digital instruments. The earthquake generated distinct stronger free oscillations of the Earth’s lithosphere. Also, further coupling of these oscillations reportedly resulted in distinct atmospheric as well as ionospheric perturbations of certain modalities and frequencies. The present paper examines whether the excited stronger "spheroidal normal modes" of free earth oscilations could have contributed as well to tsunami generation enhancement, and to the lasting and persistent tidal oscillations that were recorded in the Andaman Sea and elsewhere. The present review further examines the efficiency of coupling of excited stronger solid free earth oscillations with the ocean, and analyzes whether these could have contributed significantly to the destructiveness of the tsunami that was observed in the Indian Ocean, or to unusual far-field water level fluctuations recorded by tide gauges in the Pacific and Atlantic Oceans – which cannot be supported by calculated tsunami travel times. Additionally to the 2004 event, other major earthquakes, volcanic and meteorological events are similarly examined as to their possible excitation of free Earth oscillations or coupling with the sea surface and the atmosphere, to generate far-field, tsunami-like sea level fluctuations or meteotsunamis.
topic surface seismic waves
free earth oscillations
tsunamis
earthquake source observations
26 december 2004 earthquake
spherodial / toroidal modes
rayleigh & love wave interactions
url http://www.tsunamisociety.org/394Pararas-Carayannis.pdf
work_keys_str_mv AT georgepararascarayannis evaluationoftheimpactofmajorearthquakesonexcitinglongperiodfreeearthlithosphericoscillationsatmosphericionosphericpertrubationsandfarfieldtsunamilikewaterlevelfluctuations
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