LOGNONNÉ , P.

After the 11 March 2011 earthquake and tsunami off the coast of Tohoku, the ionospheric signature of the displacements induced in the overlying atmosphere has been observed by ground stations in various regions of the Pacific Ocean. We analyze here the data of radio occultation satellites, detecting the tsunami-driven gravity wave for the first...

Tsunamis propagating along the ocean surface generate internal gravity waves which can be detected in the atmosphere and ionosphere using airglow or total electron content (TEC) measurements. Since the late 1960s, the summation of the seismic normal modes of the Earth allows to simulate the seismic ground motions measured by seismometers. We...

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Lunar impact flash (LIF) observations typically occur in R, I, or unfiltered light, and are only possible during night, targeting the night side of a 10-60% illumination Moon, while >10°above the observers horizon. This severely limits the potential to observe, and therefore the number of lower occurrence, high energy impacts observed is...

International audience

Most tsunamis occur after large submarine earthquakes, particularly in the Pacific Ocean. However, following the 2004 tsunami in the Indian Ocean, tsunami hazard awareness was significantly raised at the global scale, and warning systems were developed in many other regions, where large tsunamis are rarer but can also produce large...

Seismological constraints obtained from receiver function (RF) analysis provide important information about the crust and mantle structure. Here, we explore the utility of the free-surface multiple of the P-wave (PP) and the corresponding conversions in RF analysis. Using earthquake records, we demonstrate the efficacy of PPs-RFs before...