Ionospheric remote sensing of the Denali Earthquake Rayleigh surface waves
Article first published online: 25 SEP 2003
Copyright 2003 by the American Geophysical Union.
Geophysical Research Letters
Volume 30, Issue 18, September 2003
How to Cite
2003), Ionospheric remote sensing of the Denali Earthquake Rayleigh surface waves, Geophys. Res. Lett., 30, 1951, doi:10.1029/2003GL017812, 18., , and (
- Issue published online: 25 SEP 2003
- Article first published online: 25 SEP 2003
- Manuscript Accepted: 20 AUG 2003
- Manuscript Revised: 8 AUG 2003
- Manuscript Received: 23 MAY 2003
 Using the Global Positioning System, we have detected ionospheric disturbances associated with the long-period Rayleigh waves from the 2002 Denali earthquake (Ms = 7.9). The dense California GPS networks allowed us to map the ionospheric perturbations and to compute the group velocity with a high spatial resolution above the Pacific coasts. Due to a low sampling rate, a large error in the velocity determination remains. Nonetheless, it demonstrates that bi-static remote sensing measurements of seismic waves with GPS networks can be performed. Monostatic measurements with a dedicated satellite could possibly be used to record in the ionosphere surface waves originating from large earthquakes. Such a space-based remote sensing of the local group velocity of Rayleigh surface waves would effectively complement the seismic networks for high-resolution global tomography of the Earth's lithosphere.