Today’s Eruption Summary
Eruption continues as usual with three minor things to note. First: “fuming” on the southwestern margin of the flow near Pohoiki could mean possible breakouts, according to today’s HVO Kilauea status update.
Same source also says that, rather unusually, a 4.1 earthquake at 10:02 pm was felt all the way to Hilo, far more widely than the stronger summit collapse events, possibly because it was at a depth of 7 miles.
And finally, Tuesday will mark the 89th day of the eruption, surpassing the length of the 1955 Kapoho eruption which had previously held the record for the longest LERZ eruption since westerners arrived and began keeping records.
From Other Geologists
Erik Klemetti’s Rocky Planet blog in Discover magazine invites readers to “Check Out How The 2018 Eruption Has Changed At Kilauea’s Summit“. Although I suspect readers of this blog are well aware of pretty much everything in that post!
I tweeted him a question about “Halema’uma’u Caldera,” which he seems to be using instead of “Kīlauea caldera.” I know Halemaʻumaʻu crater has expanded so much it could be classified as a caldera now, but so far HVO scientists have resisted doing so, to avoid confusion with the larger, older caldera.
July 30 HCFD Overflight Photos
HCFD’s July 30 album is up on Flickr. Just 12 photos plus the video clip at the top of this post. Including the clearest views we’ve seen of Isaac Hale Park in some time, since the laze plume wasn’t in the way:
Here’s a few USGS photos from today plus the LERZ map, and overflight video and photos from Mick and Bruce:
I was taking a bit of a break from in-depth posts, but a few new details in an answer to a common question caught my eye.
Q: [What happened to explosive groundwater/lava interaction?]
USGS: The debris choking the vent has largely prevented the release of ash during these events, and the dusty clouds produced are mainly from rockfall debris. Our understanding of the mechanisms involved has evolved as well: https://volcanoes.usgs.gov/observatories/hvo/hvo_volcano_watch.html?vwid=1371 …
Q: [Is the debris holding back groundwater?]
USGS: The rubble is too porous to have a damming effect. The conduit rock is still hot, so it may be that the groundwater is being turned to steam before it has a chance to reach the conduit. We can see ample steaming from the cracks in the crater floor and walls.
From Other Photographers
And a few items from social media, including today’s @Hotseathawaii overflight from Bruce Omori.
Lava Update for Monday, July 30, 2018, 6:00 am – Kilauea's lower east rift zone overflight:My airborne partner in…
Mick Kalber Overflight July 29:
Here’s Mick Kalber’s overflight video and observations from yesterday, with sober glimpses of the brushfire burn area.
I do wish HCFD had been able to do some water drops, but I understand it’s a hazardous area to fly over, especially down low.
Not from Mick’s flight, but another good aerial shot on the 29th: