Anak Krakatau volcano
Kartavya Desk Staff
Source: Scitechdaily
Context:. A new study reveals that Indonesia’s Anak Krakatau volcano, which collapsed catastrophically in 2018 causing a deadly tsunami, showed warning signs years in advance.
About Anak Krakatau Volcano:
• Location: Anak Krakatau (“Child of Krakatoa”) is located in the Sunda Strait, between Java and Sumatra in Indonesia.
• Volcano Type: Stratovolcano
• Tectonic Context: Situated at the convergent boundary between the Indo-Australian and Eurasian plates. It is part of the Pacific Ring of Fire, a seismically active zone encircling the Pacific Ocean.
• It is part of the Pacific Ring of Fire, a seismically active zone encircling the Pacific Ocean.
• 2018 Disaster: In December 2018, its southwest flank collapsed into the sea during an eruption, generating a tsunami that killed over 400 people and injured thousands more.
• New Research & Discovery:
• Technology used: InSAR (Interferometric Synthetic Aperture Radar): Satellite-based remote sensing that detects surface deformation within centimetre to millimetre accuracy. Data was sourced from ALOS-1, COSMO-SkyMED, and Sentinel-1 satellites over a 10+ year period. Findings The volcano’s flank slipped ~15 meters between 2006 and 2018. Acceleration of slip observed months before the 2018 collapse — a key precursor to disaster.
• Technology used: InSAR (Interferometric Synthetic Aperture Radar): Satellite-based remote sensing that detects surface deformation within centimetre to millimetre accuracy. Data was sourced from ALOS-1, COSMO-SkyMED, and Sentinel-1 satellites over a 10+ year period.
• InSAR (Interferometric Synthetic Aperture Radar): Satellite-based remote sensing that detects surface deformation within centimetre to millimetre accuracy.
• Data was sourced from ALOS-1, COSMO-SkyMED, and Sentinel-1 satellites over a 10+ year period.
• Findings The volcano’s flank slipped ~15 meters between 2006 and 2018. Acceleration of slip observed months before the 2018 collapse — a key precursor to disaster.
• The volcano’s flank slipped ~15 meters between 2006 and 2018.
• Acceleration of slip observed months before the 2018 collapse — a key precursor to disaster.
• Broader Implications:
• Highlights the risk of collapse in ocean volcanoes and potential for tsunami generation. Ground-based GPS is often impractical in such regions due to cost, terrain, and safety issues. Real-time InSAR processing offers a promising solution for early detection in remote areas.
• Highlights the risk of collapse in ocean volcanoes and potential for tsunami generation.
• Ground-based GPS is often impractical in such regions due to cost, terrain, and safety issues.
• Real-time InSAR processing offers a promising solution for early detection in remote areas.