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The 2004 Mw 4.4 Rotenburg, Northern Germany, Earthquake and its possible relationship with Gas Recovery

Authors
/persons/resource/dahm

Dahm,  Torsten
Deutsches GeoForschungsZentrum;

Krüger,  F.
External Organizations;

Stammler,  K.
External Organizations;

Klinge,  K.
External Organizations;

/persons/resource/kind

Kind,  Rainer
2.4 Seismology, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Wylegalla,  K.
External Organizations;

Grasso,  J.-R.
External Organizations;

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Citation

Dahm, T., Krüger, F., Stammler, K., Klinge, K., Kind, R., Wylegalla, K., Grasso, J.-R. (2007): The 2004 Mw 4.4 Rotenburg, Northern Germany, Earthquake and its possible relationship with Gas Recovery. - Bulletin of the Seismological Society of America, 97, 3, 691-704.
https://doi.org/10.1785/0120050149


https://gfzpublic.gfz-potsdam.de/pubman/item/item_235817
Abstract
We study the 20 October 2004 Mw 4.4 Rotenburg (Wümme)/Neuenkirchen earthquake, located in a previously aseismic region in the northern German sedimentary basin. We constrain the source parameter by using different techniques. A possible relationship between this event, the regional tectonic setting, and local gas recovery is investigated. Different waveform in version and modelling approaches constrain the depth of the mainshock between 5 and 7 km. The source mechanism was oblique normal faulting on planes striking roughly north-south. An inversion for kinematics rupture parameters indicates a unilateral rupture propagation toward the north, consistent with the higher macroseismic intensities found toward the north in the region of Hamburg compared with those at a similar distance toward the south in the region of Hannover. Relocations of the mainshock and three of the largest aftershocks indicate that these events occurred within a few kilometres of three major gas fields and at depth close to gas production intervals. Comparison with seismicity triggered in the northern Netherlands by depletion of similar gas reservoirs in a similar tectonic environment suggests that the Mw 4.4 Rotenburg event may be related to gas recovery.