Get our newsletter!
Check out our volcano tours on VolcanoAdventures.com!
Volcanoes & Earthquakes - new app for Android
Guaranteed tours:
26 Sep - 1 Oct 2018: Adventure Volcano - Yasur Volcano Travel - Tanna Island (Vanuatu)
26 Sep - 10 Oct 2018: Volcanoes and Cultures - Adventures in the South Sea - Vanuatu (South Sea)
30 Sep - 7 Oct 2018: Fascination Volcano - Santorini Island (Greece)
30 Sep - 10 Oct 2018: The Volcanoes of Ambrym - the Grand Traverse - Vanuatu (South Sea)
6-13 Oct 2018: Pearl of the Aegean - Santorini - Santorini Island, Greece
13-20 Oct 2018: Almonds, olives and volcanoes - Nisyros Island, Greece
15-20 Oct 2018: Krakatau Volcano Special - Krakatau volcano, Sunda Strait
13-29 Nov 2018: Volcano Special: Ibu - Dukono - Lokon - Halmahera (Indonesia)
17-30 Nov 2018: Desert, salt and volcanoes - Danakil desert (Ethiopia)
8-21 Dec 2018: Desert, salt and volcanoes - Danakil desert (Ethiopia)
: spaces available / : guaranteed / : few spaces left / : booked out

Support us?


Maintaining the volcano and earthquake news sections on this website, the free Volcano Webcams tool and interactive map widget is a free-time, both time- and server cost intensive effort.
If you find the information useful and would like to support us, and help keep it alive and improve it, please consider making a small donation. Thank you!
Random pictures

Illustrated Volcano Glossary

Search for term:

block

Volcanology: (volcanic) block
Large ballistically ejected block on Santorini (Greece)
Large ballistically ejected block on Santorini (Greece)
Volcanic blocks are solidified rock fragments greater than 64 mm in diameter. Blocks commonly are ejected during explosive eruptions and consist of older pieces of the volcano's edifice, e.g. parts of the conduit, lava domes or older lava flows.
During violent eruptions, blocks of up to several meter size can be thrown to several km distance. For example, during the Minoan eruption (ca. 1613 BC) of the Santorini volcano in Greece, meter-sized blocks were thrown to up to 7 km horizontal distance and impacted violently into the ground, some of them destroying houses of ancient settlements. The time some of these blocks spent on their trajectories can be easily calculated to be around 30-40 seconds, while they have traveled at speeds of typically 200-300 m/s.

Related keywords (1):

bomb
 

More on VolcanoDiscovery:

Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Text and images on this webpage are copyrighted. Further reproduction and use without authorization is not consented. If you need licensing rights for photographs, for example for publications and commercial use, please contact us.