Abstract's details
The 2022 Honga Tonga Tsunami monitored by satellite altimetry and SAR
Event: 2022 Ocean Surface Topography Science Team Meeting
Session: Application development for Operations
Presentation type: Oral
The Hunga-Tonga submarine volcano produced a violent explosion on Saturday 15/01/2022 at approximately 04:15 UT (17:15 local time). The explosion generated a tsunami affecting all the Pacific Ocean.
The tsunami has been detected in the multimission (Duacs) operational Sea Level products ingesting the flying altimeters Jason-3, Sentinel-3A, Sentinel-3B provided by Eumetsat, Cryosat-2, Saral, HY-2B provided by Cnes. After a specific processing carried out to remove the natural variability of the ocean, the tsunami signal was detected very clearly in the constellation, notably on HY2B, first to fly over the area 1h30 after the eruption. Comparisons to models show a position mismatch in the NRT predictions, demonstrating the interest of altimetry in tsunami analyses.
The signature of the tsunami was also detected in radar images from the Copernicus Sentinel-1A synthetic aperture radar (SAR) satellite. the peak wavelength of the retrieved waves was estimated allowing us to track them back near the center of the eruption, therefore confirming that they were generated by this event.
This paper describes the tsunami signal as observed by the altimetry constellation and Sentinel1A.
The tsunami has been detected in the multimission (Duacs) operational Sea Level products ingesting the flying altimeters Jason-3, Sentinel-3A, Sentinel-3B provided by Eumetsat, Cryosat-2, Saral, HY-2B provided by Cnes. After a specific processing carried out to remove the natural variability of the ocean, the tsunami signal was detected very clearly in the constellation, notably on HY2B, first to fly over the area 1h30 after the eruption. Comparisons to models show a position mismatch in the NRT predictions, demonstrating the interest of altimetry in tsunami analyses.
The signature of the tsunami was also detected in radar images from the Copernicus Sentinel-1A synthetic aperture radar (SAR) satellite. the peak wavelength of the retrieved waves was estimated allowing us to track them back near the center of the eruption, therefore confirming that they were generated by this event.
This paper describes the tsunami signal as observed by the altimetry constellation and Sentinel1A.
Contribution: APO2022-The_2022_Honga_Tonga_Tsunami_monitored_by_satellite_altimetry_and_SAR.pdf (pdf, 3198 ko)
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