Robin Lacassin @RobinLacassin@qoto.org

Maybe you have seen in the news stories about a strange #seismic
signal in Sept. 2023 that has been linked to a giant #tsunami
in a remote #fjord
in #Greenland?

Perhaps the best way to get an overview of that study is this excellent 10' video by S. Hicks and colleagues: youtu.be/60T9TKuuujs

On 4 December, at 15:19 UTC, a strong #pyroclastic flow along the Sciara del Fuoco on #Stromboli #volcano reached the sea and generated a moderate #tsunami, hopefully not causing damage (according to INGV). Tide gauge in Ginestra recorded it with a delay of only a few minutes, and crest to crest amplitude of ~60cm.

Stromboli is an Italian very active volcano from the Aeolian islands in the Tyrrhenian sea (Mediterranean). Its activity, and more particularly hazards due to the pyroclastic flows, are monitored by INGV.

INGV reported about the tsunami: https://ingvterremoti.com/2022/12/05/stromboli-4-dicembre-2022-tsunami-si-o-tsunami-no/
And about the volcanic event itself: https://ingvvulcani.com/2022/12/05/cosa-e-successo-a-stromboli-il-4-dicembre-2022/

Magnitude Mw 7 #earthquake offshore #Guadalcanal island in #Solomon archipelagos. Small #tsunami waves in Honiara on other side of the island.

There, at the San Christobal trench, the Australian plate is subducting beneath the Solomon arc.

Moment tensor solution ("beach ball" on the map) implies rupture either on a vertical fault or a nearly horizontal one. More data and models will be needed to understand if the earthquake happened on the subduction megathrust or within the downgoing plate.

MT and source function from http://geoscope.ipgp.fr/index.php/en/catalog/earthquake-description?seis=us7000irfb
Sea level graph from https://webcritech.jrc.ec.europa.eu/SeaLevelsDb/Device/1695

Few months ago, together with @RaphaelGrandin and J.M. Lalande from MeteoFrance, I participated as a scientific advisor to the making of this amazing scientific illustration 👇 #scicom #sciart

It summarizes scientific observations on the Hunga #Tonga #volcano explosion, associated global #tsunami and atmospheric waves.

French newspaper Le Monde published these 2 pages in September 2022. Great work by the journalist and the graphic designer, Vahé Ter Minassian and Audrey Lagadec.

DM if you would like a higher resolution PDF 😉