World-wide gravity and pressure signals detected during the eruption at Hunga-Tonga

The excitation of long-period signals has been reported for large eruptions such as El Chichon (1982) and Mount Pinatubo (1991).We report on series of pressure and gravity signals associated with the series of violent explosions at the Hunga-Tunga eruption, on 14-15th January 2022 at different locations and set-up configurations.We present records from various stations all over the world. Those stations have different set up and local configurations.At most stations, gravity signals records reveal clearly surface waves associated to the main eruption at ~4:30, 15th January and pressure wave up to Iceland.We analyze similarity and difference in the signals in association with the location and the station configurations