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Determination of Epicenters before Earthquakes Utilizing Far Seismic and GNSS Data: Insights from Ground Vibrations
- Source :
- Remote Sensing, Vol 12, Iss 3252, p 3252 (2020)
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- Broadband seismometers, ground-based Global Navigation Satellite Systems (GNSS), and magnetometers that were located within an epicentral distance of approximately 150 km consistently observed the novel anomalous behaviors of the common-mode ground vibrations approximately 5–10 days before the M6.6 Meinong earthquake in Taiwan. The common-mode ground vibrations with amplitudes near 0.1 m at frequencies ranging from 8 × 10−5 to 2 × 10−4 Hz were generated near the region close to the epicenter of the impending earthquake. The common-mode vibrations were consistently observed in seismic and GNSS data associated with five other earthquakes in four distinct areas. The results reveal that the common-mode vibrations could be a typical behavior before earthquakes. The causal mechanism of common-mode vibrations can be attributed to crustal resonance excitations before fault dislocations occur. Potential relationships with other pre-earthquake anomalies suggest that the common-mode vibrations could be ground motion before earthquakes, which was investigated for a significant length of time.
- Subjects :
- Seismometer
pre-earthquake anomalous phenomena
geography
geography.geographical_feature_category
010504 meteorology & atmospheric sciences
Magnetometer
common-mode ground vibrations
Fault (geology)
010502 geochemistry & geophysics
01 natural sciences
law.invention
Vibration
pre-earthquake ground motion
Amplitude
law
GNSS applications
Epicenter
General Earth and Planetary Sciences
Ground vibrations
lcsh:Q
lcsh:Science
Seismology
Geology
0105 earth and related environmental sciences
Subjects
Details
- Language :
- English
- ISSN :
- 20724292
- Volume :
- 12
- Issue :
- 3252
- Database :
- OpenAIRE
- Journal :
- Remote Sensing
- Accession number :
- edsair.doi.dedup.....2256316bcac7d0ef7212e570c6a7075d