Fjord resonance seismic sound

A large rockslide occurred in Greenland on 16 September 2023 that generated a local tsunami. The event was energetic enough to generate a global signal that resonated for 9 days.

This is a sonification of the seismic data from this event, recorded in Ivittuut, Greenland for the subsequent 10 days, sped up 30,000 times: three seconds audio is about a day in the data.

You can hear the harmonic resonance of the water in the fjord, sloshing from side to side every minute and half. Many earthquakes from around the world are also audible as high-pitched chirp when far (surface waves) and claps when close (body waves).

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Original publication: Kristian Svennevig et al., A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days.Science385,1196-1205(2024).DOI:10.1126/science.adm9247
A podcast about it (in french): https://savoirs.unistra.fr/eclairage/le-son-dun-glissement-de-terrain-a-lautre-bout-de-la-planete

Sonification method:
A seismometer (seismic station) records ground velocity in time. This data can be turned into sound by speeding it up, as ground motion is usually in infrasonic frequencies. Most seismic data can be freely (although not easily) downloaded from https://service.iris.edu/fdsnws/dataselect/1/.