Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3517
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dc.contributor.authorallTakahashi, I.; Graduate School of Science and Technology, Chiba University, Yayoicho, Chiba, Japanen
dc.contributor.authorallHattori, K.; Graduate School of Science, Chiba University, Yayoicho, Chiba, Japanen
dc.contributor.authorallHarada, M.; Earthquake Prediction Center, Tokai University, Shinizu-Orido, Shizuoka, Japanen
dc.contributor.authorallYoshino, C.; Graduate School of Science, Chiba University, Yayoicho, Chiba, Japanen
dc.contributor.authorallIsezaki, N.; Graduate School of Science, Chiba University, Yayoicho, Chiba, Japanen
dc.date.accessioned2007-12-20T13:49:05Zen
dc.date.available2007-12-20T13:49:05Zen
dc.date.issued2007-02en
dc.identifier.urihttp://hdl.handle.net/2122/3517en
dc.description.abstractGeoelectrical and geomagnetic fluctuations are considered the end product of several geophysical phenomena. In particular these signals measured in seismically active areas can be attributed to stress and strain changes associated with earthquakes. The complexity of this problem has suggested the development of advanced sophysticated methods to investigate the heterogeneous nature of these fluctuations. In this paper, we analyzed the time dynamics of short-term variability of geoelectrical potential differences and geomagnetic fields obsereved at Kiyosumi (KYS), Uchiura (UCU), and Fudago (FDG) stations, located in the southern part of Boso Peninsula, one of the most seismically active areas in Japan. Anomalous changes in electric and magnetic fields are obeserved in mid-night on October 6, 2002. the anomalous signals observed on October 6, 2002 are different from those originated from the train and other cultural noises according to the investigation on preferred directions of geoelectric field. The investigation of simaltaneous geomagnetic field changes suggest that the source of the electromagnetic change might be generated by underground current because of the polarity pattern oberved at KYS, UCU and FDG. Therefore, electrokinetic assumption under the ground seems one of the possible solutions for the generation of anomalous signals. It is important to understand the ULF electromagnetic environment for the study on the preparation process of crustal activity and systematic understanding both electromagnetic and seismic phenomena.en
dc.language.isoEnglishen
dc.relation.ispartofseries1/50 (2007)en
dc.subjectULF electromagnetic environmenten
dc.subjectgeoelectrical potential differencesen
dc.subjectdirection of signal arrivalen
dc.subjectunderstanding the preparation process of crustal activityen
dc.titleAnomalous geoelectrical and geomagnetic signals observed at Southern Boso Peninsula, Japanen
dc.typearticleen
dc.type.QualityControlPeer-revieweden
dc.subject.INGV04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversalsen
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dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.contributor.authorTakahashi, I.en
dc.contributor.authorHattori, K.en
dc.contributor.authorHarada, M.en
dc.contributor.authorYoshino, C.en
dc.contributor.authorIsezaki, N.en
dc.contributor.departmentGraduate School of Science and Technology, Chiba University, Yayoicho, Chiba, Japanen
dc.contributor.departmentGraduate School of Science, Chiba University, Yayoicho, Chiba, Japanen
dc.contributor.departmentEarthquake Prediction Center, Tokai University, Shinizu-Orido, Shizuoka, Japanen
dc.contributor.departmentGraduate School of Science, Chiba University, Yayoicho, Chiba, Japanen
dc.contributor.departmentGraduate School of Science, Chiba University, Yayoicho, Chiba, Japanen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptGraduate School of Science and Technology, Chiba University, Yayoicho, Chiba, Japan-
crisitem.author.deptGraduate School of Science, Chiba University, Yayoicho, Chiba, Japan-
crisitem.author.deptEarthquake Prediction Center, Tokai University, Shinizu-Orido, Shizuoka, Japan-
crisitem.author.deptGraduate School of Science, Chiba University, Yayoicho, Chiba, Japan-
crisitem.author.deptGraduate School of Science, Chiba University, Yayoicho, Chiba, Japan-
crisitem.author.orcid0000-0002-6880-406X-
crisitem.classification.parent04. Solid Earth-
Appears in Collections:Annals of Geophysics
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