Volcanos

[Buster's Uncle]

Well.  That was over abruptly.

[Buster's Uncle]

[Lord Avalon]

So that was not quite 9 hrs.

The Friday 0921 local update said:

"Initial fountain heights reached 700-800 ft (210-240 meters) but have lowered to just over 330 feet (100 meters)."
...

"Recent lava fountaining episodes have often been in the range of 6-12 hours duration."

[Lord Avalon]

There was an additional update from Friday 1249 local:

"Episode 33 of the ongoing Halemaʻumaʻu eruption ended abruptly at 12:08 p.m. HST on September 19 after just under 9 hours of continuous fountaining.

The north vent stopped erupting at approximately 12:08 p.m. HST. The south vent stopped erupting at approximately 6:00 a.m. HST this morning after a few intermittent outbursts. Lava fountains reached up to 700–800 feet (210–240 meters) during the early hours of the eruption, making these the highest fountains since episode 28 in July.  The north vent fountain was tilted at about 60 degrees to the east, which is less than the 30–45 degree tilts of the episode 31 and 32 fountains.  After the initial stages, the fountain height remained around 300–400 feet (90–120 meters) high during most of this episode. Approximately 8.25 million cubic yards (6.3 million cubic meters) were erupted during episode 33 and lava flows covered about 2/3 of the floor of Halemaʻumaʻu crater."

...

"The Uēkahuna tiltmeter (UWD) recorded about 16.5 microradians of deflationary tilt during this episode. The end of the episode was coincident with a rapid change from deflation to inflation at the summit and a decrease in seismic tremor intensity at 12:08 p.m. HST, at the same time fountaining stopped."

[Lord Avalon]

From the latest update:

"Glow from the vents was observed overnight. The summit is reinflating, and models indicate that episode 34 is likely to start between September 28 and October 1."

[Buster's Uncle]

I've seen a little glow in the uphill vent two nights running.

[Lord Avalon]

Very voggy this morning.

[Buster's Uncle]

There was a lava flow briefly ca 2:14 Hawaiian time from the uphill vent, and looks to be one commencing now, three hours later.

[Lord Avalon]

More overflow ~0414, lasting ~11 min. Then ~0511 lasting ~15 min. Seems to be percolating again a little after 0600.

[Lord Avalon]

From the Monday update:

"Glow from both north and south vents was observed overnight, with nine overflows from the north vent. The summit is reinflating, and models indicate that episode 34 is most likely to start today or tomorrow (September 29 or 30) with small chance of October 1."

"The UWD tiltmeter shows that the summit has been reinflating since the end of the fountaining episode, with 16 microradians of inflationary tilt. Overnight, HVO webcams showed persistent glow from north vent punctuated by 9 gas piston cycles of overflow and drainback at 9:47 p.m., 2:15 a.m., 4:16 a.m., 5:12 a.m., 6:18 a.m., 6:32 a.m., 7:00 a.m., 7:40 a.m., and 8:14 a.m., each lasting 5-10 minutes.  There was intermittent strong glow from south vent. This morning, the caldera is quiet with a passive outgassing plume rising from the vents."

[Buster's Uncle]

The cycle's gotten a lot shorter since - interesting viewing today.

[Lord Avalon]

From Tuesday morning update:

"Glow from both north and south vents was observed overnight, with over 100 overflows from the north vent since September 28. The summit continues to inflate, and models indicate that episode 34 is most likely to start today, September 30, with small chance of starting tomorrow on October 1."

"The UWD tiltmeter shows that the summit has been reinflating since the end of the fountaining episode, with 17 microradians of inflationary tilt. Overnight, HVO webcams showed persistent glow from north vent punctuated by over 200 gas piston cycles of lava filling and drainback, each lasting 2-10 minutes. Over 100 overflows were produced, mostly from 1:30 p.m. HST to just before midnight on September 29.  There have only been 10 overflows since midnight with the last one occurring just before 6 a.m. HST. There was intermittent strong glow from south vent through the night and early morning. This morning, the caldera is quiet with a passive outgassing plume rising from the vents."

[Lord Avalon]

Last update was blank (and who knows when there'll be another update), and ~2334 local lava is being expelled upward with a little more force than before, though perhaps not very high and not yet in a continuous streem. Several minutes later, enough lava has accumulated on top of the vent to run down the side.

[Lord Avalon]

Seemed to get more serious ~0100 local, then high fountaining a few minutes later.

[Lord Avalon]

Extremely offline: what happened when a Pacific island was cut off from the internet

A colossal volcanic eruption in January 2022 ripped apart the underwater cables that connect Tonga to the world – and exposed the fragility of 21st-century life

Guardian link