Vulkaan Kilauea op Hawaii

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Op vrijdag 25 mei 2018 06:34 schreef Eyjafjallajoekull het volgende:
Nog even een kleine realitycheck voor sommige

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Op vrijdag 25 mei 2018 09:13 schreef Eyjafjallajoekull het volgende:

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Welke? Je bedoelt zo'n grote als een deel van de vulkaan de zee in schuift en vervolgens New York vernietigd?

Mega Tsunami: Hawaii.mov

Nobody is talking about this - 'Hilina Slump" - Could cause Mega-Tsunami if it goes!

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Op vrijdag 25 mei 2018 09:40 schreef Basp1 het volgende:
De tsunami gekkies die niets van de bewegingsgrafieken begrijpen maar wel er een uitgesproken mening op nahouden.

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Op vrijdag 25 mei 2018 09:45 schreef Eyjafjallajoekull het volgende:

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Ah dat is een andere dan? Ik dacht dat er ook 1 was in die buurt die wel NY zou kunnen raken. Afijn, maakt verder niet uit

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Kilauea volcano update: New fissures, large lava flows from western and central part of fissure system

The eruption continues at similar levels as during the past days, with conditions changing faster than it is possible to accurately update.

Multiple lava flows fed from multiple fissure vents continue to feed several lava flows. The main advance has been from the central-western part of the system towards the north-east, invading additional inhabited and forested areas. The number of destroyed houses has unfortunately been increasing with the hour almost. A tendency of activity moving uprift (NE) is visible overall.
The ocean entry (created by two flows) showed little to no activity yesterday morning, but probably is still active. HVO / USGS reported late last evening (Hawaiian time) that "Fissures 7 and 8 remain the most active eruptive centers of the system", while "Fissure 22 has waned, and Fissure 13 is the dominant source of lava entering the ocean, which is occurring at three minor entry points. Fountaining is occurring at Fissure 8. Fissure 7 activity increased overnight, with lava fountains reaching 150-200 feet high and producing a large spatter rampart over 100 feet tall."

At 19:00 Sunday evening (local time), the large perched lava pond created by lava from fissure #7 apparently breached, creating a fast moving lava flow that ran down Leilani Avenue and Luana Street in Leilani Estates, then continued to move NE, crossing Pohoiki road and invading the western part of the Puna Geothermal Venture (PGV), where at least one of the drill wells (previously sealed) was covered.

At least two new fissures (#24 and #25) have formed in the area of southern Nohea St in the western-central fissure system, feeding new lava flows that advance mostly to the N and NE, destroying additional portions of the central part of Leilani Estates

Fast Lava Flow: Emergency Evacuation In Leilani (May 27, 2018)

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Activity update
In the lower East Rift Zone (LERZ) fissure system, the area of Leilani Estates and Lanipuna Gardens was the scene vigorous eruption of lava also throughout Monday 28 May.

Early Monday morning it became clear that the fast-moving flow which broke out the evening before originated from fissure 8 which fed a channelized flow that first moved north along an older flow before turning east and quickly destroying a new residential area. Its initial advance rate of hundreds of meters (yards) per hour had however slowed down to a few meters (yards) an hour by Monday morning and eventually stalled during a short period of inactivity. Late in the afternoon of Monday 28 May, however, vigorous fountaining resumed at fissure 8, producing a fast-moving lava flow that travelled first north and then northeast at a speed of ca 18 meter (20 yards) an hour. Fissure 8’s vigorous fountaining has produced significant amounts of Pele’s hair which are transported downwind, with reports of some strands falling in Pahoa.

Several other fissures which were inactive on Monday morning 28 May reactived again later that day with spattering and lava fountains, the highest of which were observed at fissure 7/21. A resulting lava flow was moving south from fissures 16/18, but the amounts of lava they had erupted was not yet enough to reach the ocean so that only a minor ooze of residual lava was entering the ocean on Monday evening. (HVO/USGS)

Ash continued to erupt intermittently from the vent within Halemaʻumaʻu crater, at Kīlauea's summit throughout Monday 28 May. HVO/USGS reports that a brief emission event at about 4:35 AM local time sent ash to about 3050 meter (10,000 feet) above sea level, and a similar event around 6:30 AM sent ash to approximately 3660 meter (12,000 feet) above sea level. Observations from the ground, by UAS, and by satellite during the past week have documented retreat of the summit vent walls due to collapse of the steep conduit and rim.
Earthquakes are currently occurring at high rates in the summit area and a magnitude 4.1 earthquake occurred at 5:39 PM HST on the Koa'e fault zone south of the caldera. Seismicity continues in the summit region as the area subsides and adjusts to the withdrawal of magma.

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Activity in Lower Puna remains at high levels
The activity in Lower Puna remains stable at high levels with the principal vents being fissure #8 (western portion of the system) and #18 (eastern part). Both feed voluminous lava flows that continue to consume land, property and pose threats as to cut-off additional areas, prompting the need for evacuations especially in the Kapoho area.

Fissure #8 inside Leilani maintains its strong lava fountaining, with jets of liquid lava reaching 60-80 m (200-250 feet) and feeds the large lava flows directed to the NE with current flow fronts on and north of Hwy 132 in the area of of Noni Farms road.

Although the flow front advance has currently slowed to less than 50 yards per hour, it can pick up quickly and the threat of it reaching the Four Corners area and cutting off Kapoho remains significant. Evacuations of Kapoho are underway.

On the western end, a new lava flow from fissure #18 is now headed to probably generate a new ocean entry soon in the Ahalanui Beach Park area, which would cut off Pohoiki and a large triangle of land.