Geomagnetic Effect of the Earthquakes with Mw = 7.5–7.8 in Turkey on February 6, 2023

This paper is focused on study of the geomagnetic field variation response caused by a series of earthquakes with magnitudes of M w = 7.5–7.8 in Turkey on February 6, 2023. The initial data include high-precision observations of the geomagnetic field with a one-second sampling rate recorded at magne...

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Bibliographic Details
Published in:Doklady earth sciences 2023-07, Vol.511 (1), p.578-584
Main Author: Soloviev, A. A.
Format: Article
Language:English
Subjects:
Amplitudes
Distance
Earth and Environmental Science
Earth Sciences
Earthquakes
Geomagnetic effects
Geomagnetic field
Geomagnetic field variations
Geomagnetism
Magnetic field
Magnetic fields
Observatories
Seismic activity
Seismic response
Seismology
Signal delay
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Summary:This paper is focused on study of the geomagnetic field variation response caused by a series of earthquakes with magnitudes of M w = 7.5–7.8 in Turkey on February 6, 2023. The initial data include high-precision observations of the geomagnetic field with a one-second sampling rate recorded at magnetic observatories in Russia and neighboring countries from middle to high latitudes. The paper analyzes the morphology of the geomagnetic signal, its amplitude-frequency characteristics, pulses in the rate of change and delays of the geomagnetic field response to earthquakes with magnitudes M w = 7–8 depending on the distance to the source. The results suggest that the geomagnetic effect is detected best in the rate of change recordings, reaching anomalous amplitudes of 10 nT/s. The signal delay ranges from 221 to 592 s depending on the magnetic field component and the distance to the epicenter, which is in the range from 765 to 2650 km for the selected observatories.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X23600731