No clear evidence for temporal tidal tilt modification prior to the 1999 Izmit 
and Düzce earthquakes in NW-Anatolia

Westerhaus, M.; Zschau, Jochen; 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

No clear evidence for temporal tidal tilt modification prior to the 1999 Izmit and Düzce earthquakes in NW-Anatolia

Authors

Westerhaus, M.
External Organizations;

/persons/resource/zschau

Zschau, Jochen
2.1 Physics of Earthquakes and Volcanoes, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

External Ressource

No external resources are shared

Fulltext (public)

There are no public fulltexts stored in GFZpublic

Supplementary Material (public)

There is no public supplementary material available

Citation

Westerhaus, M., Zschau, J. (2001): No clear evidence for temporal tidal tilt modification prior to the 1999 Izmit and Düzce earthquakes in NW-Anatolia. - Sokuchi-Gakkai-shi = Journal of the Geodetic Society of Japan, 47, 1, 448-455.

https://gfzpublic.gfz-potsdam.de/pubman/item/item_226086

Abstract

Abstract: Since 1985, Earth tidal signals in borehole tilt- and well level data are investigated with respect to changes in the state of deformation along a 60 km long segment of the North-Anatolian Fault, about 200 km east of Istanbul, Turkey. Modifications of up to 100 per cent in amplitude and 80 degree in phase (with respect to the response on a laterally homogeneous earth) of the static tidal tilt response functions are essentially explained by the presence of the fault zone. The strong influence of the shear zone varies over time by not more than 4 per cent in amplitude and 3 degree in phase. Despite the short distance of the 6 stations to the epicenters of the 1999 catastrophic earthquakes of Izmit and Duezce (60 km - 110 km and 17 km - 44 km, respectively) no significantpre-, co- or postseismic variations of the local tidal tilt response functions were detected.