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Hawaii 30 June 2018

Hawaii

hawaii 30 june

Hawaii earthquake map 30 june2018

Hawaii lava flow 30 june

Hawaii lava flow map 30 June2018

Kīlauea Volcano Lower East Rift Zone

The eruption in the lower East Rift Zone (LERZ) continues with no significant change during the past 24 hours.

Fountains from Fissure 8 spatter cone continue to supply lava to the open channel with intermittent small, short-lived overflows. These overflows rarely extend beyond the existing flow field. No active overflows were observed during this morning’s helicopter overflight.The spatter cone is now about 55 m (180 ft) tall at its highest point, and fountains rarely rise above that point. At the coast, the northern margin of the flow field is still oozing fresh lava at several points in the area of Kapoho Beach Lots. Lava was entering the sea over a broad area this morning primarily on the northern side of the entry area. As shown by yesterday’s thermal map of the flow field, the lava channel has crusted over about 0.8 km (0.5 mi) inland of the ocean entry; lava is moving beneath the crust and into still-molten interior of earlier flows before it enters the sea in multiple oozeouts.

Pele’s hair and other lightweight volcanic glass fragments from the lava fountain at Fissure 8 continue to fall downwind of the fissure, dusting the ground within a few hundred meters (yards) of the vent. High winds may waft lighter particles to greater distances. Residents are urged to minimize exposure to these volcanic particles, which can cause skin and eye irritation similar to volcanic ash.

The most recent map of lava flows can be found at https://volcanoes.usgs.gov/volcanoes/kilauea/multimedia_maps.html

HVO field crews are on site tracking the fountains, lava flows, and spattering from Fissure 8 as conditions allow and are reporting information to Hawaii County Civil Defense. Observations are also collected on a daily basis from cracks in the area of Highway 130; no changes in temperature, crack width, or gas emissions have been noted for several days.

Volcanic gas emissions remain very high from Fissure 8 eruptions. Continuing trade wind conditions are expected to bring VOG to the southern and western parts of the Island of Hawaii. VOG information can be found at https://vog.ivhhn.org/

The ocean entry is a hazardous area. Venturing too close to an ocean entry on land or the ocean exposes you to flying debris from sudden explosive interaction between lava and water. Also, the lava delta is unstable because it is built on unconsolidated lava fragments and sand. This loose material can easily be eroded away by surf, causing the new land to become unsupported and slide into the sea. Additionally, the interaction of lava with the ocean creates “laze”, a corrosive seawater plume laden with hydrochloric acid and fine volcanic particles that can irritate the skin, eyes, and lungs.

Magma continues to be supplied to the Lower East Rift Zone. Seismicity remains relatively low in the area with numerous small magnitude earthquakes and low amplitude background tremor. Higher amplitude tremor is occasionally being recorded on seismic stations close to the ocean entry.

Additional ground cracking and outbreaks of lava in the area of the active fissures are possible. Residents downslope of the region of fissures should heed all Hawaii County Civil Defense messages and warnings.  HVO

Kīlauea Volcano Summit

After the collapse/explosive event at 07:51 AM HST yesterday, seismicity dropped abruptly from a high of 30-35 earthquakes per hour (many in the magnitude 2-3 range) prior to the collapse explosion down to 10 or fewer earthquakes per hour afterwards. This morning, the summit seismicity is again at 30-35 earthquakes per hour as we await the next collapse/explosive event. Inward slumping of the rim and walls of Halemaʻumaʻu continues in response to ongoing subsidence at the summit.

Sulfur dioxide emissions from the volcano’s summit have dropped to levels that are about half those measured prior to the onset of the current episode of eruptive activity. This gas and minor amounts of ash are being transported downwind, with small bursts of ash and gas accompanying intermittent explosive activity. HVO

kilauea-deep-2july18.jpg

The above are deep quakes, 12 to 22 miles down.

I notice there is increasing quake activity at the west end of the rift near the west end of the island while the lava outflow continues at the east end of the rift. Quakes are running the full length of the rift as well as increased quakes along the subsurface face below…pg

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14 responses to “Hawaii 30 June 2018

  1. p.g.sharrow July 1, 2018 at 7:43 am

    As I examine the quake activity I keep getting more concerned. The south side of the Kilauea rift is getting more and more active. I have seen no data on spreading yet, but no data does not mean no spreading, just no data. That swarm at the west end of the rift must mean something. the quakes range from over 20 miles down up to the surface. The quake numbers under the south slope at sea keep increasing. that is the place where the warning of eminent slide will take place. The eruption at vent 8 in the Leiani Estates continues, and shows no sign of abating, in fact is slowly increasing. If it abates and the quake numbers increase get ready to run as this rock pile will be shifting seaward.
    Interesting watching geology happen…pg

  2. p.g.sharrow July 2, 2018 at 7:41 am

    Fissure #8 seems to be stable with it’s splatter cone and it’s lava fountain180 feet above ground level, fissure #22 has come back to life with cone and fountain reaching 180 feet as well.
    The flow from #8 continues to feed the Vacationland flow into the sea and #22 is feeding a growing flow to the south of it…pg

  3. H.R. July 3, 2018 at 9:00 am

    If there is a big slide, would that create a weak spot for a major eruption where the there is less overhead containment mass?

    It would be bad news if there was a slide and then a tsunami and then a major eruption.

    “Dear Diary. Today was a bad day.”

  4. p.g.sharrow July 3, 2018 at 5:40 pm

    A major eruption at the Hawaii complex would be quite a show, BUT! a big slide could be a major disaster for the whole Pacific rim. Bad Day indeed! This particular side of the Island is way over burdened and gone a long while without sloughing off. From looking at the surface, the rift has widened on the east end nearly 2 miles over the last 6,000 years. Geologists say the present rate of movement is about 10 inches per year, average. It appears to me that something is going on at the west end of the rift. There is an ongoing earthquake swarm there that ranges from nearly 30 miles down to up to the surface. The spread of the rift over time appears to be pivoting with the hing point at the west end. Earthquake and magma seem to me to be dozing the south side of the rift off of the side of the big island ..pg

  5. H.R. July 3, 2018 at 7:50 pm

    p.g.: “This particular side of the Island is way over burdened and gone a long while without sloughing off.”

    Yah, but… I was wondering if there’d be a major eruption if the overburden sloughed off. I know there will be a ‘bad hair day’ tsunami that will affect the entire Pacific boundary land masses if a major slide occurs.

    🤔 Ah… okay. If the magma in the main chamber is above the level of the vents, AND the overburden sloughs off, then gravity and pressure takes over and there should be some sort of a blow and flow where the side of the volcano wall has thinned. So yes, I’d expect some lava flow where the side has thinned. Major or minor is dependent upon how high the magma is above the slide and how much overburden falls away during a slide, but I would expect some eruption from the side where the slide occurs.

    What’s that old saying about a bacon and eggs breakfast? The chicken is involved, but the pig is committed. 😁 Well, I’m in the first state carved out of the Northwest Territory and pay taxes. So I would most likely be involved via taxes, should a big slide occur, but I’m safely inland and would not be committed as would be the Pacific islands and the land bounding the Pacific.

    It would be interesting to me if a slide and a blowout occurred, but there are millions who might not find it all that interesting as their life flashes before their eyes. A few, yes, but they would be the exception. (That brings to mind that fellow who was taking video of Mt. St. Helens when it blew. He didn’t survive, but his video did, and IIRC, he was awestruck, not terrified, when he met his end.)

  6. p.g.sharrow July 4, 2018 at 7:56 am

    @HR you are correct. My main concern is the economic disaster that we will have to endure after a major tsunami. Modern communication should give enough warning for most of the people to escape the coastal ruin. BUT, half of the worlds commerce would be disrupted for several years, 200 million people would have to be cared for for an extended period of time. There is nothing anyone can do about it but watch. I would guess a lot of beach front property would be available CHEAP afterwards…pg

  7. H.R. July 6, 2018 at 7:17 pm

    Still wandering around your blog, p.g., and I’m enjoying the stroll.

    Oh, Hey! I thought I spotted the Scout in one of the photos. I looked as closely as I could and wasn’t sure. It might have been your ‘wheelbarrow,’ which in a photo clearly identifying your wheelbarrow, looks similar to a Scout except for the tail lights.

    I found a ’63 Scout up in Maine for $12,500. It is un-restored, but it might be worth buying… except I need to replace the furnace, air conditioner, and roof shingles, so I’m weighing how totally irresponsible I want to be.

    Oh… I was out weeding my current garden and I thought you might like a peek. However, I’m thinking of letting it grow a bit more before tripping a shutter. It’s still pretty early here (July, fer cryin’ out loud) but I think it will be lush by the end of the month.

    Oops! I know you’re not all that strict about staying on topic, but I’ll switch and post on the garden thread with a few photos and a couple of garden stories. I’ll let this comment RIP here.

  8. p.g.sharrow July 6, 2018 at 9:45 pm

    Well it is good manners to stay on subject, but we are not too fussy on such things. I don’t think the old scout is in any of my pictures. It is nearly hidden in brush now. It really needs a new home and restoration, hasn’t been run since 96. $12,500 sounds kind of steep for a worn out Scout that only cost $2,500 brand new with extras!
    We have been harvesting green beans for the last week and they were planted a bit early for the soil temperature. Just dug a couple of rows of potatoes and planted the space in Brussel Sprouts. Blue potatoes that I started from seeds a number of years ago. Nearly wild type that takes several generations of tuber propagation to yield 8oz tubers. Seeds and fruit are like tiny tomatoes. First year tubers are about the size of a big pea. Second year the size of a chicken egg. The interesting thing is that once you grow a crop there seems to always be a few that escape and show up the next spring just like real weeds!
    I guess I should do another garden post. right after I post a recipe on making a Blackberry pie. We shall see what M’lady thinks about it after dinner tomorrow. First Blackberries of this year’s crop as well as my second attempt at pie making. It ain’t pretty, but I am more interested in the crust and filling edibility. Told her to bring home Ice cream 😎 if she wanted alamode…pg

  9. H.R. July 18, 2018 at 6:58 am

    I’m pretty sure you caught the news that 13 tourists were injured by a lava bomb which hit their tour boat. They were near the spot where the lava was entering the sea.

    The entry point is an unusual sight to see, so the tour boats and tourist interest is understandable, but didn’t their mothers ever tell them, “Be home by dark, don’t take candy from strangers, and don’t go playing in the volcano?”

  10. p.g.sharrow July 18, 2018 at 6:53 pm

    @HR, oh yes I saw that news item, the locals are being daily warned to stay well clear of the area. Guess they wanted better pictures, oops. Explosions can throw rock debris long distances, stay well clear.
    We had a similar problem with the tidal glaciers in Alaska, Stay well clear of calving glaciers as the ice shed sometimes goes deep and can pop up under your craft with disastrous results, even for ships.
    I have been watching the quake maps. It looks to me that a section of the overhang SSE of Kilauea is getting loose. If you look at the map you see several “bites have broken off of the western end. The next in line is showing quakes in another “bite” pattern as is another to the east of it. Just watching Geology happen….pg

  11. H.R. July 19, 2018 at 5:16 am

    p.g.: “[…] as the ice shed sometimes goes deep and can pop up under your craft with disastrous results, even for ships.”

    I had’t thought of that but yeah, some of the sheds are thousands of tons. Like dropping an ice cube in a glass of water, it goes under and then pops up and bobs a bit.

    Oh, I did catch one awesome glacier video that went around a couple of years ago. A group hiked around a bay (forget what bay) and were on the rocks chatting and recording. A huge chunk broke off and the resulting tsunami had a couple of the guys in serious danger. I can’t recall now if anyone died, but the guys did get whacked and smacked back up into the rocks by the huge wave.
    .
    .
    .
    I’ll have to check out the latest maps and videos of Kilauea. I haven’t checked in on the volcano for a couple of weeks. I’ll check out the problem spots you mentioned. Thanks for the pointer.

    P.S. Still waiting for the blackberry pie report.

  12. H.R. July 19, 2018 at 8:01 pm

    Okay, I some time (after fishing ) this evening and I got to looking at the summit. The walls of the crater are collapsing inward. If enough collapses into the crater, wouldn’t increase the pressure on the side rifts and increase the chance that they could slough off some of the side of the volcano?

    I haven’t run across any comments on that other than one that pointed out that seismic activity increased when some of the walls slumped inward into the lava pool. From that I inferred that there was a capping effect, but there was no further comment about the increased chances of some of the side of the volcano soughing off.

    Do you have some knowledge of that or an educated opinion?

    Reply: see latest post…pg

  13. p.g.sharrow July 19, 2018 at 9:34 pm

    @HR; as the Volcano “deflates” and the dome sags, quakes in the area increase in number. Now 725 a day rate. Periodically there is a 5+ quake at Kilauea and the numbers drop to less the 500, then build again. It appears to me the 5+ quake is triggered by the land tide caused by sun and moon “passage” caused by the Earth’s rotation.
    Gas emissions from the volcano have been greatly reduced since the rift vent opened. Most of the gas emissions now come from the fissure 8 vent along with the lava. The latest report is that the amount of lava flowing from the vent is increasing. I would think that the vent is a leak that reduces the pressure under the Kilauea Dome. Think of the dome of layers of rigid rock floating on a molten bubble that is deflating. As the rock deforms the upper layers start cracking down to a more plastic layer, It cracks to relieve it’s stress and the upper layers start cracking as the stress is transferred to them. There was a report of lava surging at the vent, day before yesterday morning, but it subsided back to regular flow.
    The quakes that I am watching are south of the Rift from the surface down to -25.000feet. There is this arch or bite looking area of quakes that are of particular interest, actually 2 of them, that seem to be continuations of 3 that already have collapsed from west to east along the coast. The venting is miles away at the east end of the Rift.

    On the Blackberry pie……Well we ate it, not bad, Not great, but not bad, Need to adjust the recipe and try again. I’m using a deep dish 10 inch dia.glass plate with a lattes cover. the shell pie crust looked and tasted good but needs a bit more flour, The Blackberry filler was a bit tart, needs more sugar and still a bit runny, needs a bit more flour and corn starch. All and all, close but not quite right. Had to force my self to eat it……………..in 4 days 😎 rather then 1 LoL…pg

    M’Lady only ate a second piece, the first serving wasn’t enough! she rarely finishes a first. 😉 …pg

  14. p.g.sharrow July 19, 2018 at 11:10 pm

    Reply: See latest post…pg

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