Instant tsunami early warning based on real-time GPS – Tohoku 2011 case study GFZ German Research Centre for Geosciences, Potsdam, Germany
17 May 2013
Received: 20 November 2012 – Revised: 29 March 2013 – Accepted: 18 April 2013 – Published: 17 May 2013Abstract. Taking the 2011 Tohoku earthquake as an example, we demonstrate the ability
of real-time GPS to provide qualified tsunami early warning within minutes.
While in earlier studies we demonstrated the power of the so-called GPS
shield concept based on synthetic data, we here present a complete
processing chain starting from actual GPS raw data and fully simulate the
situation as it would be in a warning center. The procedure includes
processing of GPS observations with predicted high precision orbits,
inversion for slip and computation of the tsunami propagation and coastal
warning levels. We show that in case of the Tohoku earthquake, it would be
feasible to provide accurate tsunami warning as soon as 3 min after the
beginning of the earthquake.
Citation: Hoechner, A., Ge, M., Babeyko, A. Y., and Sobolev, S. V.: Instant tsunami early warning based on real-time GPS – Tohoku 2011 case study, Nat. Hazards Earth Syst. Sci., 13, 1285-1292, doi:10.5194/nhess-13-1285-2013, 2013.