Vulkaan Kilauea op Hawaii

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Hawaiian volcano might erupt in 24 hours after 250 quakes in short time
A Hawaiian volcano could be set to erupt after hundreds of earthquakes and the collapse of a crater floor.

Lava may burst through the ground east of Kilauea, the most active of the five volcanoes that form the state’s main island, geologists have warned.

Authorities urged the public to be on alert after scientists noted underground magma flowing beneath a main road near houses in the district of Puna.

More than 250 earthquakes have been detected since a crater floor collapsed at the Pu’u O’o vent in the shield volcano’s eastern rift zone earlier this week.

Most were minor but many were felt by locals, including one with a magnitude of 4.2, which shook the coast on Tuesday morning.

Scientists from the US Geological Survey’s Hawaiian Volcano Observatory (HVO) warned the seismic activity could lead to a lava breakout, although they could not say where or when.

“Magma has now migrated into a lower part of the east rift zone,” she said, adding there was concern that it was in a rift near Highway 130, a major road on the island.

There are homes in that area of Hawaii's Big Island and the road also leads to a popular access point where people can hike or bike into the lava viewing area.

The Hawaii County Civil Defence Agency issued an alert warning people in the area to monitor the situation and be prepared for the possibility of a new lava flow.

Spokeswoman Kanani Aton said the agency was “planning ahead for a worst-case scenario” by reviewing emergency plans and monitoring the activity.

Ms Babb said the activity has slowed significantly since a spike earlier this week but the threat level has not changed.

However, scientists are not sure if decreased seismic activity is an indication that the event is over or if it has just stalled before picking back up.

“That’s the unknown at this point," Ms Babb said. "Therefore we are still watching, we are watching very closely."

Geologists flew over the area in a helicopter and observed a layer of red ash covering the ground near the Pu’u O’o vent. The ash was spread throughout the area when the crater floor collapsed.

“The good news is that as they flew down the east rift zone they didn’t see any ground cracks or steaming that would suggest that the magma was coming near the surface,” Ms Babb said.

Most of Kilauea’s activity has been not been explosive, but an eruption in 1924 spewed ash and 10-tonne rocks into the sky, killing one man.

In 1983 an eruption of Pu’u Oo resulted in lava fountains soaring over 1,500 feet high. In the decades since, the lava flow has buried dozens of square miles of land and destroyed many homes.

In 2008, after a series of small earthquakes rattled the island, Kilauea’s summit crater opened and gushed lava and rock over 75 acres of the mountain, damaging a nearby viewing point

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Kilauea-vulkaan op Hawaï spuwt rook en lava
De Kilauea-vulkaan op Hawaï spuwt rook en lava. Voor het eerst sinds 2016 ligt er lava op de kraterbodem.

Kilauea In Hawaii OnGoing (Emergency Event) | Server 4 | VolcanoYT

Overflowing Lava Lake Recorded From Above Kilauea (Apr. 26, 2018)

Kilauea Volcano Earthquake Swarm Alert: Hawaii

twitter:

janinekrippner twitterde op woensdag 02-05-2018 om 16:01:53 Kilauea: "A new crack 1 km (0.6 mile) long was found on the west (uprift) side of Pu‘u ‘Ō‘ō during HVO's overflight"https://t.co/VBscoQsYl1 https://t.co/EWAtqpX12l reageer retweet

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Kilauea volcano: Residents along the East Rift Zone told to prepare to evacuate

Lower Puna officials in Hawaii are preparing for a possible eruption amid continuous earthquakes along the East Rift Zone of Kīlauea Volcano. The preparations include the identification of shelters, mobilization of police and other security personnel to ensure residents’ safety, and road crews to ensure access to evacuation routes.

"Should an eruption occur, residents along the East Rift Zone may have little warning and should be prepared to evacuate," said Civil Defense Administrator Talmadge Magno, adding that the County will keep the community informed about the situation.

"All agencies have been alerted about the possibility of an eruption," Magno said. "The risk areas and possible hazards are being identified, and shelters have been identified."

Recent observations
Elevated rates of seismicity and deformation at Kīlauea Volcano along a section of the lower East Rift Zone east of the Pu‘u ‘Ō‘ō vent continue, the Hawaiian Volcano Observatory (HVO) reported 05:23 UTC on Thursday, May 3, 2018.

This activity is associated with the continued intrusion of magma into the East Rift Zone to locations east of Highway 130 and an outbreak of lava from the lower East Rift Zone remains a possible outcome of the continued unrest, HVO warns. At this time it is not possible to say with certainty if or where such an outbreak may occur, but the area downrift (east) of Pu‘u ‘Ō‘ō remains the most likely location.

A GPS station located about 1.5 km (1 mile) southwest of Nanawale Estates began moving toward the north on Wednesday morning local time, indicating the magma intrusion is approaching this area of the East Rift Zone. The station has already moved several centimeters.

A tiltmeter at Pu‘u ‘Ō‘ō recorded steady, deflationary tilt during the day, with several sharp inflation offsets. These offsets probably recorded the continued episodic collapse of the crater floor. Some of these offsets corresponded to short-lived ashy plumes rising from the crater.

Tiltmeters at the summit began recording an increased deflationary tilt this afternoon. The summit lava lake level has lowered about 20 m (65 feet) since the deflationary tilt began in the early morning on May 1.

New small ground cracks less than a few cm (inches) wide developed yesterday across a couple of roads in and adjacent to Leilani Estates. These cracks reflect the buildup of stress at the surface due to the magma intrusion. No steam or gases were observed escaping from the cracks.

Analysis of webcam images of the 61g lava flow field on May 1 indicates that surface flows within a few kilometers of Pu‘u ‘Ō‘ō have stopped advancing - the few areas of incandescence visible in the images did not move starting early morning on May 1. The 61g flow is likely no longer being supplied with lava from Pu‘u ‘Ō‘ō.

Flyover Pu'u O'o: Huge Plume, Steaming Fissures (May 1, 2018)

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Kilauea volcano erupts near residential area
Mount Kilauea volcano has erupted near a residential area on Hawaii's largest island, prompting a local state of emergency and the mandatory evacuation of 1,700 local residents.

One witness said lava had burst across a road like a curtain of fire. He said he could smell sulphur and burning trees.

Community centres have been opened to provide shelter.

The eruption follows a series of strong earthquakes over recent days.

A volcanic crater vent - known as Puu Oo - collapsed earlier this week, sending lava down the mountain's slopes towards populated areas.

Officials had been warning residents all week they should be prepared to evacuate as an eruption would give little warning.

twitter:

ABC twitterde op vrijdag 04-05-2018 om 06:48:57 Lava can be seen spewing from a vent in Hawaii's Leilani Estates community on the Big Island after eruption of Kilauea volcano. https://t.co/DdDqlKmyV2The county has ordered evacuations for all of Leilani Estates, which according to the last Census has a population of 1,500. https://t.co/v8O2poQGPe reageer retweet