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Processed Sentinel-1 InSAR data of the multi-year gradual flank destabilisation of Anak Krakatau volcano, Indonesia

Urheber*innen
/persons/resource/zorn

Zorn,  Edgar
2.1 Physics of Earthquakes and Volcanoes, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/magda88

Stefanova Vassileva,  M.
1.4 Remote Sensing, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/twalter

Walter,  Thomas
2.1 Physics of Earthquakes and Volcanoes, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Darmawan,  Herlan
External Organizations;

/persons/resource/roehler

Röhler,  Leonie
2.1 Physics of Earthquakes and Volcanoes, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Amelung,  Falk
External Organizations;

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Zitation

Zorn, E., Stefanova Vassileva, M., Walter, T., Darmawan, H., Röhler, L., Amelung, F. (2023): Processed Sentinel-1 InSAR data of the multi-year gradual flank destabilisation of Anak Krakatau volcano, Indonesia.
https://doi.org/10.5880/GFZ.2.1.2022.003


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5023099
Zusammenfassung
The Dec 22nd 2018 flank collapse and tsunami at Anak Krakatau in Indonesia is a key event in geosciences as little is known about the lead-up processes and deformation changes prior to flank failure. We processed Sentinel-1 satellite radar data in both ascending (orbit 171) and descending (orbit 47) acquisition using multi-temporal InSAR with the Small BAseline (SB) method during the 4 years prior to the collapse. The data shows that the flank was already moving for years prior to collapse, demonstrating that developing instability in volcano can be monitored long before a collapse. The southwest flank movement rates averaged approx. 27 cm/yr, but underwent intermittent accelerations coinciding with distinct intrusion events in Jan/Feb 2017 and in Jun 2018. The data archived here supplements the material detailed in Zorn et al. (202X, https://doi.org/XXXXX).