Earth tides, earthquake occurrence and earth deformation
2010
Kansowa, Tarek
An analysis of Earth deformation, earthquakes and tides has been undertakenusing Earth tide and interferometric SAR data from ESA satellites. The abilityof Earth tides to trigger earthquakes has been investigated by measuring thestatistical relationship between earthquake occurrence and Earth tides.Analysing Earth tides data with earthquakes occurrence using Shuster’s test hasshown that there is a correlation between Earth tides and earthquakeoccurrence. The significance of this correlation has been examined as afunction of location, earthquake depth and magnitude. It has been found thatthe correlation is especially significant for low magnitude earthquakes. The tworegions in California examined show similar correlations but significantdifferences in the phase angle of the correlation. Possible reasons for thesedifferences and the role of ocean load tides are discussed in this thesis.SAR data are used to detect the Earth displacement related to two recentearthquakes in the Californian area. InSAR technique has been appliedsuccessfully to the Bam earthquake in Iran in 2003. The results for Earthdisplacements in the Parkfield area are less satisfactory but a number ofinterference fringes over a wide area due to a particular earthquake have beenobserved.
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