The eruption had notably waned over the last couple days, comments on social media and webcam video indicating sluggish spatter within the small cones that had built up over the last week around the fissures. Last night numerous small bits of glow were visible all across the crater floor, but no fountaining was in evidence.
My Facebook post describing a last moment mission to the volcano caught the attention of one of our local reporters. Result? An interview and a little piece about volcano viewing carried on several of the local media outlets. Nothing serious, they are just trying to capture the event of the moment and the local response. Perhaps something positive in the face of all the tragic fallout from the Lahaina disaster that fills the local news. Not my first time in the news, but the first time in a while, it is always fun…
Watching the recent and repeated eruptions in the Kilauea caldera has made an interesting bit of info clear… The first few hours are the most spectacular.
Months of inflation Kilauea had stored large quanities of gas and built up a considerable amount of pressure, enough pressure to lift the megatons of rock above the magma chamber and cause the entire summit region to swell outwards.
Beween eruptions USGS geologists and armchair vulcanologists like myself keep an eye on the tiltmeters as the pressure in the volcano builds, awaiting the time that accumulating magma and increased pressure bursts through the overlying rock to begin a new eruptive cycle.
Eruptive activity began to wane at the end of last week,with the lava fountains diminishing, then disappearing over the weekend. Views in the webcams showed a steady decrease in activity at fissure 3 over the course of several days.
At this point no lava appears to be emerging onto the surface, with only a few dribbles left in the lava flow to be seen as minor glows across the flank of the mauna.
Oddly Kilauea, after erupting continuously for over a year seems also to have paused. There is no longer any visible lava or even a glow within the Halemauʻmauʻu crater.
On the way home in the eve the red glow dominates the horizon. Going to work the next morning it is the plume on the skyline. The eruption is ever present.
When moving to the island fifteen years ago I had looked at the mauna and thought to myself… One day you will erupt, will it be during my time on the island? This though has occured to me many times in the intervening years… When hiking the lava flows in the saddle, when driving up and down Mauna Kea to work looking across at the many flows streaking the flanks of Mauna Loa. How many times have I looked up and wondered when? One day.
I am not certain what woke me up at one AM, but I was awake. Before going back to sleep I decided to check the satellite photos to see if I might get some telescope time before dawn. But what I found online had me totally awake and grabbing a couple batteries for the camera.
Mauna Loa has awoken.
I was soon driving out from the house to a point above the village with a clear view of the mauna. The whole southern sky an angry red over the village as I drove. I did not have to drive far, just a couple minutes from the house where you can find a clear view. Pulling off I set up the camera and shot.
I was not the only one out, half a dozen cars could be seen stopped along Waikoloa Road to view the eruption. The whole mauna is lit up red and it looks like the west flank is erupting, not just the caldera as Civil Defense currently insists. Just the clouds lit up on that side?
Life is intertesting.
Update: By dawn much of the caldera has flooded with lava. Scale is hard to see in the photos, you have to recall that the caldera is almost two miles across and three miles from end to end.
Update 9:11am: The eruption has already migrated to a series of fissures on the northeast flank. The typical Mauna Loa eruption script is a summit caldera eruption followed by a flank eruption a few days, or a few weeks later. We have just seen that happen in a few hours.
I am including a couple photos here taken by a co-worker as she commuted across the saddle this morning at dawn. You can already see the lava flows making their way into the saddle…
Earthquake activity is on a bit of an uptick around here. While the mag 3.9 that woke us up a few nights ago was probably just a settling event under Mauna Kea, much of the remaining activity is under Mauna Loa. This includes a 3.7 magnitude event last night, part of an ongoing swarm under the long mountian.
Mauna Loa’s activity has remained elevated for some weeks now. There are two swarm centers. One directly under the caldera, but more interestingly a persistent swarm under the northwest flank a few kilometers away.
All of this has the island buzzing with concern. On social media, in the local papers, Mauna Loa is the subject of much speculation. The official line is that no eruption is imminent, but officials are quick to remind residents to monitor local emergency channels and have an evaculation plan at the ready.