This article is from the source 'guardian' and was first published or seen on . It last changed over 40 days ago and won't be checked again for changes.
You can find the current article at its original source at https://www.theguardian.com/world/2019/jan/01/terrawatch-landslide-tsunami-lessons-from-anak-krakatau
The article has changed 2 times. There is an RSS feed of changes available.
Previous version
1
Next version
| Version 0 | Version 1 |
|---|---|
| Terrawatch: landslide tsunami lessons from Anak Krakatau | Terrawatch: landslide tsunami lessons from Anak Krakatau |
| (14 days later) | |
| Just over a week ago, the Indonesian volcano Anak Krakatau blew its top, losing about two-thirds of its height. | Just over a week ago, the Indonesian volcano Anak Krakatau blew its top, losing about two-thirds of its height. |
| Most of this 150m cubic metres of rock is thought to have slid into the sea in one go, generating a tsunami that killed more than 400 people. Tsunami warning systems are in place around Indonesia, but they are tailored to earthquake tsunamis, triggering only if an earthquake and large wave are detected. | Most of this 150m cubic metres of rock is thought to have slid into the sea in one go, generating a tsunami that killed more than 400 people. Tsunami warning systems are in place around Indonesia, but they are tailored to earthquake tsunamis, triggering only if an earthquake and large wave are detected. |
| “Recognising a landslide tsunami is much harder. The time between detection and the tsunami coming ashore is likely to be very short, so it is hard to make the system effective,” says Dave Petley, a landslide expert at the University of Sheffield. | “Recognising a landslide tsunami is much harder. The time between detection and the tsunami coming ashore is likely to be very short, so it is hard to make the system effective,” says Dave Petley, a landslide expert at the University of Sheffield. |
| Volcano flank collapses are common and can be gigantic: prehistoric landslides from the Canary Islands have been over 100bn cubic metres. They probably didn’t slide in one go, but there will still have been very large tsunami waves locally. | Volcano flank collapses are common and can be gigantic: prehistoric landslides from the Canary Islands have been over 100bn cubic metres. They probably didn’t slide in one go, but there will still have been very large tsunami waves locally. |
| All active volcanoes near the sea – of which there are many – present a potential landslide tsunami risk. Sadly it is too late for Anak Krakatau, but installing movement sensors on other vulnerable volcanoes, and monitoring with satellite, could help give warning and save lives in future. | All active volcanoes near the sea – of which there are many – present a potential landslide tsunami risk. Sadly it is too late for Anak Krakatau, but installing movement sensors on other vulnerable volcanoes, and monitoring with satellite, could help give warning and save lives in future. |
| Volcanoes | Volcanoes |
| Terrawatch | Terrawatch |
| Natural disasters and extreme weather | Natural disasters and extreme weather |
| Indonesia | Indonesia |
| Asia Pacific | Asia Pacific |
| features | features |
| Share on Facebook | Share on Facebook |
| Share on Twitter | Share on Twitter |
| Share via Email | Share via Email |
| Share on LinkedIn | Share on LinkedIn |
| Share on Pinterest | Share on Pinterest |
| Share on WhatsApp | Share on WhatsApp |
| Share on Messenger | Share on Messenger |
| Reuse this content | Reuse this content |
Previous version
1
Next version