Description: 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).
Global identifier:
Doi(
"10.5880/GFZ.2.1.2022.003",
)
Origins: /Wissenschaft/GFZ
Tags: Radar ? Satellit ? Tsunami ? Daten ? Monitoring ? Geowissenschaften ? Anak Krakatau ? Collapse Hazard ? EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC LANDFORMS > VOLCANO ? Earth Observation Satellites > Sentinel GMES ? InSAR ? Volcano flank instability ?
License: cc-by/4.0
Language: Englisch/English
Issued: 2022-01-01
Time ranges: 2022-01-01 - 2022-01-01
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