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Authors: Masci, F.*
Title: On the ULF magnetic ratio increase before the 2008 Iwate–Miyagi Nairiku earthquake by Hirano and Hattori (2011)
Title of journal: Journal of Asian earth sciences
Series/Report no.: /56 (2012)
Publisher: Elsevier Science Limited
Issue Date: 29-Aug-2012
DOI: 10.1016/j.jseaes.2012.05.020
Keywords: Geomagnetic field
Magnetic anomalies
Earthquake precursors
Abstract: Hirano and Hattori (2011), hereafter cited as H&H, report the observation of anomalous increases in the ULF geomagnetic field spectral density ratio which the authors claim to be possible precursors of the 2008 Iwate–Miyagi Nairiku earthquake. Here the results of H&H are reviewed taking into account the global geomagnetic activity level by means ofPKp index. This paper cast serious doubts on the seismogenic origin of the magnetic signatures documented by H&H showing that the anomalous signals are normal ULF magnetic variations induced by solar–terrestrial interaction. In summary, H&H’s claims that magnetic field disturbances about a month before the Mw 6.9 Iwate–Miyagi Nairiku earthquake on June 13, 2008 are precursors to the earthquake are unlikely to be correct.
Appears in Collections:04.05.99. General or miscellaneous
04.05.04. Magnetic anomalies
04.06.99. General or miscellaneous
Papers Published / Papers in press

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