* Astronomy

Members Login
Username 
 
Password 
    Remember Me  
Home -> Astronomy News -> Volcano -> New Zealand Pumice Raft
Post Info TOPIC: New Zealand Pumice Raft
Blobrana


L

Posts: 131433
Date:
Pumice
Permalink  
 

How X-rays Helped to Solve Mystery of Floating Rocks

It's true - some rocks can float on water for years at a time. And now scientists know how they do it, and what causes them to eventually sink.
X-ray studies at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) have helped scientists to solve this mystery by scanning inside samples of lightweight, glassy, and porous volcanic rocks known as pumice stones. The X-ray experiments were performed at Berkeley Labs Advanced Light Source (ALS), an X-ray source known as a synchrotron.
Read more



__________________
Blobrana


L

Posts: 131433
Date:
Havre submarine volcano
Permalink  
 

Underwater Kermadec Islands volcano research excites scientists

A world-first international expedition, including University of Otago researchers, is ending, after scientists gained striking new views of an underwater volcano in the Kermadec Islands.
Read more



__________________
Blobrana


L

Posts: 131433
Date:
Havre volcano
Permalink  
 

Havre eruption leads scientists to biggest undersea volcano

The eruption hypothesis was later backed up. Using data from the French Polynesian seismic network, the Laboratoire de Geophysique confirmed that frequent earthquakes of magnitude 3 to 5 had occurred between July 18 and July 21 that year at Havre submarine volcano, about 800 kilometres north-east of New Zealand.
Poring over comprehensive, high-resolution satellite images, the scientists subsequently confirmed the presence of gigantic rafts of silicic pumice, covering an area spanning roughly 400 square kilometres. They traced the rafts back in time to their source on July 18, when there was also evidence of an atmospheric plume, emitted from a point source, and a thermal hotspot.
Read more



__________________
Blobrana


L

Posts: 131433
Date:
Kermadec volcano
Permalink  
 

First sighting responsible for undersea eruption

New Zealand scientists are investigating active undersea volcanos, north of New Zealand. New images reveal the impacts of a significant eruption on the seafloor.
NIWA research vessel Tangaroa has just mapped the Kermadec volcano that erupted 800 kilometres north east of Tauranga, on 19 July 2012, producing a pumice raft the size of Canterbury.
Read more



__________________
Blobrana


L

Posts: 131433
Date:
New Zealand Pumice Raft
Permalink  
 

Massive Rock Raft Found Floating off New Zealand

A mass of small volcanic rocks nearly the size of Belgium has been discovered floating off the coast of New Zealand.
The stretch of golf-ball-size pumice rocks was first spotted this week by a New Zealand air force plane about 1,000 kilometres northeast of Auckland. The rocks stretch for about 26,000 square kilometres.
Read more

GNS Science vulcanologist Craig Miller told AAP that the Royal New Zealand Air Force has provided photographs of the pumice raft and New Zealand's National Maritime Coordination Centre has reported a sea disturbance 100 nautical miles long and 25 nautical miles wide, located 400km west of Raoul Island.
Read more



__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
Home -> Astronomy News -> Volcano -> New Zealand Pumice Raft


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard