NDLI: GNSS atmopheric seismology: A case study of the 2008 Mw7.9 Wenchuan earthquake

Content Provider	IEEE Xplore Digital Library
Author	Shuanggen Jin
Copyright Year	2012
Description	Author affiliation: Shanghai Astronomical Observatory, Chinese Academy of Sciences, 200030, China (Shuanggen Jin)
Abstract	Robust seismic signals around the globe could estimate the gross nature of earthquakes, but the details are usually unclear due to the lack of near-field observations. Although ground measurements, e.g., GNSS/InSAR and strong motion measurements, provide unique insights on the kinematic rupture and nature of the earthquake, but the temporal-spatial resolutions are still limited. In this paper, GNSS atmospheric seismology is proposed and a case study of the 2008 Wenchuan earthquake is performed using ground GNSS measurements. Significant ionospheric disturbances are found at continuous GNSS sites near the epicenter with an intensive N-shape shock-acoustic wave propagating south-eastward, almost consisting with seismometer, indicating that the co-seismic ionospheric TEC disturbances were mainly derived from the main shock. Furthermore, the co-seismic tropospheric anomalies during the mainshock are also found, mainly in the zenith hydrostatic delay component (ZHD), which is supported by the same pattern of surface observed atmospheric pressure changes at co-located GNSS site that are driven by the ground-coupled air waves from ground vertical motion of seismic waves propagating. Therefore, the co-seismic atmospheric disturbances indicate again the acoustic coupling effect of the atmosphere and solid-Earth with air wave propagation from the ground to the top atmosphere.
Starting Page	7504
Ending Page	7507
File Size	370011
Page Count	4
File Format	PDF
ISBN	9781467311601
ISSN	21536996
e-ISBN	9781467311595
e-ISBN	9781467311588
DOI	10.1109/IGARSS.2012.6351896
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Earthquakes Atmospheric waves Global Positioning System Global Navigation Satellite Systems Atmospheric measurements Terrestrial atmosphere Seismic measurements GNSS GNSS Atmospheric Seismology Coseismic atmospheric disturbance Wenchuan Earthquake
Content Type	Text
Resource Type	Article

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