Evaluation of ULF electromagnetic phenomena associated with the 2000 Izu Islands earthquake swarm by wavelet transform analysis

Abstract. There have been many reports on ULF electromagnetic phenomena associated with the 2000 Izu Islands earthquake swarm. In this study, seismo-magnetic anomalies are presented by examining energy variations of signatures at the periods around 100 s. Geomagnetic data observed at three stations in Izu Peninsula from 1 January 2000 to 30 April 2001 have been analyzed and wavelet transform has been performed. In order to indentify anomalous changes from ionosphere disturbances, Kakioka station has been chosen as a reference station, and the similar data analysis has been performed. The results suggest that the unusual energy enhancement of the Z component, which only appears in Izu Peninsula from late June until early November 2000, might possibly be one of electromagnetic phenomena associated with the 2000 Izu Islands earthquake swarm.

[1]  Masashi Hayakawa,et al.  Generation of ULF electromagnetic emissions by microfracturing , 1995 .

[2]  M. Johnston,et al.  Review of Electric and Magnetic Fields Accompanying Seismic and Volcanic Activity , 1997 .

[3]  Qinghua Huang,et al.  Seismic electromagnetic signals (SEMS) explained by a simulation experiment using electromagnetic waves , 1998 .

[4]  Masashi Hayakawa,et al.  ULF magnetic emissions connected with under sea bottom earthquakes , 2001 .

[5]  Qinghua Huang,et al.  One possible generation mechanism of co-seismic electric signals , 2002 .

[6]  H. Tanaka,et al.  Electric and magnetic phenomena observed before the volcano-seismic activity in 2000 in the Izu Island Region, Japan , 2002, Proceedings of the National Academy of Sciences of the United States of America.

[7]  M. Hayakawa,et al.  Variations of phase velocity and gradient values of ULF geomagnetic disturbances connected with the Izu strong earthquakes , 2003 .

[8]  V. Zheludev,et al.  Use of wavelet analysis for detection of seismogenic ULF emissions , 2003 .

[9]  S. Koshevaya,et al.  Investigation of ULF magnetic anomaly during Izu earthquake swarm and Miyakejima volcano eruption at summer 2000, Japan , 2003, 2003 IEEE International Symposium on Electromagnetic Compatibility, 2003. EMC '03..

[10]  Masashi Hayakawa,et al.  Fractal analysis of seismogenic ULF emissions , 2004 .

[11]  Masashi Hayakawa,et al.  ULF geomagnetic anomaly associated with 2000 Izu Islands earthquake swarm, Japan , 2004 .

[12]  Seiya Uyeda,et al.  ULF geomagnetic field measurements in Japan and some recent results associated with Iwateken Nairiku Hokubu earthquake in 1998 , 2004 .

[13]  Controlled analogue experiments on propagation of seismic electromagnetic signals , 2005 .

[14]  Masashi Hayakawa,et al.  Investigation of ULF magnetic anomaly during Izu earthquake swarm and Miyakejima volcano eruption at summer 2000, Japan , 2005 .

[15]  P. Kokoszka,et al.  Wavelet-Based Index of Magnetic Storm Activity , 2006 .

[16]  Masashi Hayakawa,et al.  Singular spectral analysis and principal component analysis for signal discrimination of ULF geomagnetic data associated with 2000 Izu Island Earthquake Swarm , 2006 .

[17]  M. Hayakawa,et al.  Observation of ULF geomagnetic variations and detection of ULF emissions associated with earthquakes: Review , 2008 .

[18]  M. Hayakawa,et al.  Determination of hearth position of a forthcoming strong EQ using gradients and phase velocities of ULF geomagnetic disturbances , 2006 .

[19]  Luciano Telesca,et al.  Non-uniform scaling behavior in ultra-low-frequency (ULF) earthquake-related geomagnetic signals , 2007 .

[20]  Observation of ULF geomagnetic variations and detection of ULF emissions associated with earthquakes: Review , 2008 .

[21]  Maria Macchiato,et al.  Investigating non-uniform scaling behavior in Ultra Low Frequency (ULF) earthquake-related geomagnetic signals , 2008 .

[22]  Qinghua Huang,et al.  Selectivity of seismic electric signal (SES) of the 2000 Izu earthquake swarm: a 3D FEM numerical simulation model , 2010, Proceedings of the Japan Academy. Series B, Physical and biological sciences.