ULF/ELF polarimetry: Observations of anomalous ULF signals preceding the Northridge earthquake of January 17, 1994

被引：3

作者：

Dea, JY ^{[1
]}

Hansen, PM ^{[1
]}

Boerner, WM ^{[1
]}

机构：

[1] NCCOSC, RDT&E DIV, San Diego, CA 92152 USA

来源：

WIDEBAND INTERFEROMETRIC SENSING AND IMAGING POLARIMETRY | 1997年 / 3120卷

关键词：

D O I：

10.1117/12.300623

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Continuous ULF background data are recorded at the Low Frequency Observatory in San Diego since 1990. Some 18 days preceding the large Northridge earthquake of January 17, 1994. Anomalous signals of approximately twice the background level were recorded. The timing of the anomalous signals, the return to normal levels after the quake and a delay in the onset of higher frequency anomalous signals all suggest a strong correlation of the anomalous signals with the events at Northridge. A simple model of migrating micro-fractures is used to explain the temporal characteristics of the signals.

引用

页码：195 / 206

页数：12

共 30 条

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