GNSS atmopheric seismology: A case study of the 2008 Mw7.9 Wenchuan earthquake
- 1 July 2012
- conference paper
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE) in 2012 IEEE International Geoscience and Remote Sensing Symposium
- p. 7504-7507
- https://doi.org/10.1109/igarss.2012.6351896
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.Keywords
This publication has 8 references indexed in Scilit:
- Lower atmospheric anomalies following the 2008 Wenchuan Earthquake observed by GPS measurementsJournal of Atmospheric and Solar-Terrestrial Physics, 2011
- TEC response to the 2008 Wenchuan Earthquake in comparison with other strong earthquakesInternational Journal of Remote Sensing, 2010
- Co-seismic ionospheric and deformation signals on the 2008 magnitude 8.0 Wenchuan Earthquake from GPS observationsInternational Journal of Remote Sensing, 2010
- GPS observations of the ionospheric F2-layer behavior during the 20th November 2003 geomagnetic storm over South KoreaJournal of Geodesy, 2008
- Determining the parameters of ionospheric perturbation caused by earthquakes using the quasi-optimum algorithm of spatiotemporal processing of TEC measurementsEarth, Planets and Space, 2007
- Atmospheric pressure change associated with the 2003 Tokachi‐Oki earthquakeGeophysical Research Letters, 2006
- Contributions to the theory of atmospheric refractionBulletin géodésique, 1973
- Atmospheric pressure waves and tectonic deformation associated with the Alaskan earthquake of March 28, 1964Journal of Geophysical Research, 1968