Volcanos

[Lord Avalon]

9:17 360-degree view, https://kuula.co/share/hnXjJ?logo=1&info=1&fs=1&autorotate=0.01&thumbs=1&alpha=0.65

12:00 discussion of Isak's vid showing steam venting, as lava to groundwater ratio drops

[Lord Avalon]

Isak Finnbogason's drone footage from earlier today:

[Lord Avalon]

Will there be an eruption soon in the Phlegrean Fields (Campi Flegrei) of Italy? There have been earthquakes and ground swell over the last year or so.

https://www.ansa.it/english/news/general_news/2025/07/18/another-quake-rocks-campi-flegrei-naples_ae605948-da38-401e-9d0b-95265cc2249e.html

[Lord Avalon]

Some splashing going on in the vent. It's 0410 local; lava is bright in the darkness.

[Edit] Lava pouring down the slope about a minute later.

[Lord Avalon]

0448 local, camera zoomed out as eruption is putting out more lava. Low level fountaining, but lava is moving fast downhill. They zoomed the camera out a bit and shifted the view.

[Buster's Uncle]

Great.  I checked late last night -still smoke- today was the last day of their prediction and all.

[Lord Avalon]

I wasn't watching when they issued the Volcano Notice for Aviation about 0529, so not sure how fountaining then compares to now.*

"Episode 29 high fountains of the ongoing Halemaʻumaʻu eruption began around 5:15 a.m. HST on July 20. Lava fountains from the north vent gradually transitioned from low dome fountains less than 100 feet (30 meters high) to vertical fountains exceeding 200 feet (60 meters) around that time, accompanied by the onset of summit deflationary tilt and heightened seismic tremor. Past episodes have produced incandescent lava fountains over 1,000 feet (300 meters) high and eruptive plumes up to 20,000 feet (6,000 meters) above ground level; similar behavior may be expected within the next couple hours."

"Episode 29 was preceded by north vent lava spattering that began around 3:55 a.m., followed shortly thereafter by dome fountains and lava overflows starting around 4:11 a.m. Fountains from the north vent are reaching 330 feet (100 meters) high and feeding multiple lava streams as of 5:25 a.m. HST. "

(Excerpts of https://volcanoes.usgs.gov/hans-public/notice/DOI-USGS-HVO-2025-07-19T02:53:39+00:00)

*[Edit] I went back and looked. Fountaining looked higher ~0520. The night view is cool. Go back and see how things change from 0420 to 0524.

[Lord Avalon]

LOL, someone's up there, put a hand shaka sign in front of the camera. About 0709 local.

[Buster's Uncle]

How many tons a minute of melty dirty glass a minute y'all suppose that is?

[Geo]

How many tons a minute of melty dirty glass a minute y'all suppose that is?

Depends on the size (diameter) of the fountain, and the pressure behind it.

[Lord Avalon]

Except from today's update, 20250721/0459Z:

"Episode 29 of the ongoing Halemaʻumaʻu eruption ended abruptly around 6:35 p.m. HST on July 20 after over 13 hours of continuous lava fountaining.

The north vent stopped erupting around 6:35 p.m. HST, marking the end of the episode; the weakly-active south vent had stopped erupting several hours earlier. Lava fountains did not exceed 330 feet (100 meters) during this episode, as most lava was sprayed laterally within Halemaʻumaʻu crater. An estimated 1.8 billion gallons (7 million cubic meters) of lava erupted during the episode, covering approximately 80% of the crater floor."

https://volcanoes.usgs.gov/hans-public/vona/DOI-USGS-HVO-2025-07-20T18:43:54+00:00