Mick Kalber’s daily helicopter flyover includes some intense views of the rivers of lava heading into the ocean, and the big complex of fountains— 20? 22? we’re starting to lose track— that have dominated the Lava Livestream With Rooster for the last several days.
The USGS thermal scan is very informative, too: an infrared satellite detects heat sources (the whiter the image, the hotter it is), and USGS then overlays it on a daylight satellite image of same area. Result, accurate map of where the main flows are, even when they crust over so the lava inside is hidden:
Below the cut: a digest of the day’s eruption news, USGS updates (summarized), and striking social media images and video clips like this:
Today’s big activities were: (1) massive lava fountains/flows in the Lower East Rift Zone/Lower Puna, entering the ocean at two points (2 modest ash explosions from Halema’uma’u crater (they looked to me like the 10,000 foot range). I’m going to stop worrying about whether they’re triggered by steam explosions or rockfalls.
Late afternoon HNN update includes footage of lava entry into ocean:
There’s two lava livestreams on Youtube this morning, same location, Honolulu CivilBeat mostly focusing on Fissure 20, ~1000 yards away. WXchasing moving camera more often [ETA: WX stream now archived]. HCB said Fissure 17 (3/5 a mile away) has built up a cinder cone 300 feet tall.
Last night, Fissure 20’s lava flow crossed Highway 137 and reached the ocean at 11PM, leaving some Puna residents with one escape route. Filed under “things I didn’t know,” Civil Defense warns of “Laze,” a spray of hot steam, hydrochloric acid, and “fine glass particles” when lava hits seawater.
Also filed under “things I didn’t know”: “Methane gas, produced as lava buries vegetation, can migrate in subsurface voids and explode when heated.” (USGS)
The first two weeks of sputtering fissures, slow-moving flows were prelude. Thursday night, the rivers and fountains of runny pahoehoe lava arrived. Today, Saturday afternoon, the overflight videos are historic.
From USGS (loud helicopter):
Fissures 16-20 joined up this Saturday and are marching towards the ocean, expected to cross Highway 137 tonight. Civil defense warns to keep away from ocean entry, if/when the lava reaches the shore, to avoid “laze.”
From Mick Kalber:
I have no words.
Well, okay, I do. I hope everyone down there is safely away. It’s been a hard day for a bunch of people who can’t go home now.
Yep, Rusty the Rooster is still trying to tell us it’s morning.
However, despite using a still from dawn Friday morning showing Fissure 17 at its most glorious, its cinder cone is now much higher than it is.
Friday night it was incredibly spectacular, but by Saturday the group of combined fountains at Fissure 20 had taken the spotlight, sending vast amounts of Pahoehoe down to the ocean. That said, 17 continued be loud; it’s the one that sounds like a thundering detonation or jet engine in short, loud bursts.
Activity ebbed and flowed, some days with more steam, some with more spatter. For the most part, lava flows didn’t go very far, and were largely sticky, clumpy, clanky a’a. But I bookmarked fissure 17 early on for particularly dramatic fountains (those blocks it’s hurling are called “lava bombs”) and incredible booms and roars:
Back when Pu’u O’o was healthy, it sent lava flows south down the flanks of Kilauea to the ocean, mostly away from populated areas (although unfortunately it did take out the community of Kalapana plus the half-built Royal Gardens Subdivision). See HVO’s photo history of Pu’u O’o from 1983 to the present.