5:15 PM - 7:15 PM
[HDS10-P10] GO-EUREKA – GNSS-observation based European system for earthquake and tsunami hazard assessment from the ionosphere
Keywords:ionospheric assessment of natural disasters, ionospheric seismology, tsunami early warning, GNSS
Tsunami early warning systems (TEWS) require the following set of parameters in real-time or near-real-time (NRT) to assess the tsunami hazard: 1) the seismic source dimensions and the amplitude of the co-seismic crustal uplift to infer the tsunamigenic potential of the earthquake; 2) the wave heights and the speed of tsunami propagating in open water. However, despite recent developments, the NRT monitoring and forecasting of tsunamis in both near-field (<500 km from the source) and far-field (>500 km away from the source and trans-ocean propagation) remain very challenging, and even the most advanced seismo-geodetic methods regularly fail in the estimation of the tsunamigenic potential for large (Mw>8) earthquakes.
To resolve this fundamental challenge, since 2022, we have been developing a GNSS-observation-based European system for earthquake and tsunami risk assessment “GO-EUREKA”. The GO-EUREKA system will use data from ground-based and ship-based dual-frequency GNSS-receivers in order to assess a tsunamigenic potential of submarine earthquakes and, thus, to complement and to improve the existing tsunami early warning systems (TEWS). GO-EUREKA will use quasi-continuous observations of GNSS-based ionospheric total electron content (TEC). Once the data are collected and pre-processed by the module ALTRUIST (PI-M. Ravanelli), the following steps are performed for the NRT assessment of tsunami hazards: 1) automatic detection of co-seismic and co-tsunamic ionospheric disturbances (CSID and CTID, respectively); 2) inversion for earthquake magnitude and co-seismic crustal uplift from CSID (for near-field); 3) inversion of tsunami wave heights and the propagation speed based on analysis of features of CTID (for far-field).
This contribution will present recent developments for the future NRT tsunami hazard assessment from the ionospheric observations, including the NRT detection of CSID/CTID, NRT estimation of propagation speed of CSID/CTID, confirmation of the link between the detected disturbances and earthquakes/tsunamis, by newly developed rapid simulation tools and by NRT-compatible identification of the source of ionospheric disturbances.
To resolve this fundamental challenge, since 2022, we have been developing a GNSS-observation-based European system for earthquake and tsunami risk assessment “GO-EUREKA”. The GO-EUREKA system will use data from ground-based and ship-based dual-frequency GNSS-receivers in order to assess a tsunamigenic potential of submarine earthquakes and, thus, to complement and to improve the existing tsunami early warning systems (TEWS). GO-EUREKA will use quasi-continuous observations of GNSS-based ionospheric total electron content (TEC). Once the data are collected and pre-processed by the module ALTRUIST (PI-M. Ravanelli), the following steps are performed for the NRT assessment of tsunami hazards: 1) automatic detection of co-seismic and co-tsunamic ionospheric disturbances (CSID and CTID, respectively); 2) inversion for earthquake magnitude and co-seismic crustal uplift from CSID (for near-field); 3) inversion of tsunami wave heights and the propagation speed based on analysis of features of CTID (for far-field).
This contribution will present recent developments for the future NRT tsunami hazard assessment from the ionospheric observations, including the NRT detection of CSID/CTID, NRT estimation of propagation speed of CSID/CTID, confirmation of the link between the detected disturbances and earthquakes/tsunamis, by newly developed rapid simulation tools and by NRT-compatible identification of the source of ionospheric disturbances.