The LERZ eruption continues with minor variations. This morning’s USGS overflight crew observed that Fissure 8’s fountain and lava level in the upper channel appeared to be slightly lower. However, the lava flow rate down at Kapoho Beach Lots —where there were only a few houses left, as of this morning — seems to have picked up slightly. Meanwhile, overflows spilling out from the constricted turn around Kapoho Crater have nearly reached Beach Rd about 0.2 miles north of Four Corners. Lava continues to enter the ocean along a very broad front, mostly on the northern side of the delta.
Fissure 22 is “sporadically spattering,” and its flow may have stalled.
The Italian Space Agency has posted a new satellite radar image of Kilauea Caldera, showing the ongoing subsidence across much of the crater floor (you may have to view full-sized version for the animation):
By the way, if anyone else was confused by recent Hawaii Tribune Herald articles that said SO2 levels had climbed tenfold at the summit, I checked with @USGSVolcanoes, who suggested a minor mixup. That increase is occurring down in the Lower East Rift Zone. At the summit, according to Kyle Anderson during today’s media conference call, SO2 levels have dropped to the level they were before the lava lake first appeared.
Today’s entry is going to be a challenge, because my computer chose a holiday to go pau. Arthritis and dodgy vision versus voice dictation and tablet — who will win?
Today’s eruption summary
The LERZ eruption continues pretty much as usual, with a few minor embellishments to keep field crews on their toes.
Today’s HVO update noted that Fissure 8 “has been pulsing with more vigorous output in 1-3 minute bursts.” When asked for clarification, USGSVolcanoes replied, “No true indication of change.” F8 continues to send lava downriver to Kapoho, where lava is oozing out along most of the broad front and encroaching on Kapoho Ag and Beach Lots properties.
Fissure 22 continues to spatter intermittently and produce a short, sluggish flow:
Wednesday, July 4, 2018, 5:45 am – Kilauea's east rift zone overflight: Fissure 22 continues to spatter bits of lava…
…and it still looks like a kid’s science experiment. (It’s hard to tell from overhead, but it’s a perfect steep-sided cone.)
Remember how the lava channel clogged up temporarily around the bend at Kapoho Crater yesterday? It’s still having problems:
I lucked out this morning and caught @HotSeatHawaii ‘s sunrise overflight live, which offered a good view this. Part of the lava is going wide instead of making the sharp turn, though it joins back up around the bend. (More photos below.)
Today’s summit collapse/explosion occurred at 10:19 AM HST. The view was fairly clear today, and the rockfalls were spectacular:
No major changes in the past 24 hours, except that the lava channel was full and spilling over its levees in a number of places this morning (as seen in this photo by Bruce Omori). For the most part, they weren’t venturing past the boundaries of earlier flows:
Monday, July 2, 2018, 5:45 am – Kilauea's east rift zone overflight: A number of breaches of the channels can be seen here, as the fresher lava appears more silvery than the older.
Fissure 8 continues roaring along. With slack tradewinds today, it managed to whip up enough pyrocumulus to set off some localized thunderstorms. Fissure 22 is still spattering and feeding a small flow that’s going nowhere fast. At the ocean end of Fissure 8’s channel, lava is oozing out along a broad part of the lava delta and chewing further into what’s left of Kapoho Beach Lots:
Monday, July 2, 2018, 5:45 am – Kilauea's east rift zone overflight: Homes and property in Kapoho are being consumed by the flow's expanding northern boundary.
The latest summit explosion occurred at 1:24am HST July 2, the usual M5.3, with an ash plume ~1200 feet high. Immediately before, there were about 20-25 earthquakes an hour (a little less than in recent days) and dropped to 5/hour immediately afterwards (again, a little less).
[Below is a USGS video of the June 30 collapse/explosion as seen from Volcano House, I think, which gives a good view of the rockfalls all along the bluffs of the caldera walls]:
I haven’t mentioned LERZ seismicity in some time, because it’s been low for weeks. But I notice that section of HVO’s daily Kilauea update was amended starting yesterday. Since May, it’s reported “relatively low seismicity” and “low amplitude background tremor” with “numerous small earthquakes” in the LERZ plus occasional “higher amplitude tremor” near the ocean entry. Now it’s added, “Low amplitude tremor increased slightly on June 29 associated with renewed activity at Fissure 22.”