The summary says the ash cloud is drifting southwest which would put it on the south end of the Big Island. Almost no one flies that way so it shouldn't have a big impact on aviation traffic.
> "Ladies and gentlemen, this is your captain speaking. We have a small problem. All four engines have stopped. We are doing our damnedest to get them going again. I trust you are not in too much distress"
"Because the ash cloud was dry, it did not appear on the weather radar, which was designed to detect the moisture in clouds. The cloud sandblasted the windscreen and landing light covers and clogged the engines. As the ash entered the engines, it melted in the combustion chambers and adhered to the inside of the power-plant. As the engine cooled from inactivity, and as the aircraft descended out of the ash cloud, the molten ash solidified and enough of it broke off for air to again flow smoothly through the engine, allowing a successful restart."
Lava is currently erupting in the East Rift Zone of Kilauea. The subdivisions where the lava is fountaining have been placed under a mandatory evacuation, and travel in that region of Kilauea is now limited solely to residents. Places like Hilo and Kailua-Kona are completely unaffected, except maybe for vog and future ashfall issues.
The National Guard for Hawaii is actually presently planning for a potential evacuation of Puna, since lava is currently threatening to close off all of the roads that reach those districts. The restrictions on tourists and vacationers are already in place to facilitate that putative evacuation.
Some interesting fact I found the other day: Hawaii was created by one (edit) volcanic hotspot, while the tectonic plate moved above it. And there's a line of underwater islands all the way to Siberia.
Just a quick clarification: the Hawaiian islands comprise multiple volcanoes. There's at least five that make up the Big Island (Hawai'i): Mauna Kea, Mauna Loa, Kilauea, Kohala, and Hualālai. I think what you mean is that the island chain seems to have been created by a single mantle plume / volcanic hotspot: https://en.wikipedia.org/wiki/Hawaii_hotspot
Does it need to be separate plumes or can it be bifurcation of a single plume as it passes through the crust?
Aka the Hawaiian-Emperor seamount chain:
So when news reports refer to "Hawaiʻi", it's hard to be certain what they are talking about without further clarification.
I did it once. Driving to an elevation of two miles is terrifying-- and it is cold (I didn't pack a heavy jacket to go to Hawaii), but the view was unbelievable, and it was great to visit the site of so many PBS specials.
The telescope is operated from the University at the base of the mountain so when you arrive there are a reception area and a sort of a cage in the telescope apparatus you can view the telescope from.
I could dig up pictures if anyone is interested but there are more professional ones online I'm sure.
It was near the continental divide if that helps.
It was funny seeing some people drive up in their rental mustangs. I can only imagine their brakes cooking by the base of the mountain after that downhill drive.
Hmm there are humans on the island as well?
Evacuate the area, wait until it stops, rebuild afterward in the same place because people like Hawaii well enough to accept the risk of living on a volcano.
Also any human toll is widely reported in the news media, while effects on scientific equipment is not.
The mount kea observatory is a global asset of science - I suspect that it's less important to the US authorities than their people, but it is kinda a global concern.
The lava lake at the summit is now a crater over 300 meters deep. This means that, in addition to rocks falling into the crater and subsequently being ejected into the air in the form of fine ash, water is also intruding into the column, which raises the distinct possibility of a high pressure steam explosion. The alert level was changed because there is now a persistent, high-level ash cloud that is traveling some distance. It's not on the same scale as Eyjafjallajökull (the volcano that shut down European airspace), but it is big enough to start wrapping around the Hawaiian islands.
Red means either "Eruption is forecast to be imminent with significant emission of ash into the atmosphere likely."
"Eruption is underway with significant emission of ash into the atmosphere." In this case, the latter.