Publication Date:
2017-04-04
Description:
We investigate magnetic effects in correspondence of the Mw6.1 L’Aquila earthquake. Magnetic
and seismic records are analyzed. Rapid and distinct changes and an offset can be seen in magnetic field
components after the main shock. We show that these effects result from electromagnetic induction due to
the movement of the sensors through the Earth’s magnetic field and from a permanent displacement of the
sensors from their original position caused by the passing seismic waves. A transient signal in total field data
from an overhauser magnetometer apparently occurs in correspondence with the earthquake. Our analysis
shows that the transient was not observed by other sensors that were operating in close proximity to the
overhauser. Thus, the transient signal in the total magnetic field data, and the offset in the magnetic field
components, cannot be associated with a hypothetical underground electric current generated by the
earthquake, as suggested by Nenovski (2015).
Description:
Published
Description:
6153–6161
Description:
1A. Geomagnetismo e Paleomagnetismo
Description:
JCR Journal
Description:
restricted
Keywords:
Earthquake
;
seismoelectric effect
;
04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous
;
04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies
;
04. Solid Earth::04.05. Geomagnetism::04.05.08. Instruments and techniques
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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