Peter Cobbold Posted March 7, 2021 Author Report Share Posted March 7, 2021 It will be a terrific display at night if it erupts. I had many nights short on sleep when Holuhraun erupted. Lancaster univ geologist gives an overview: https://theconversation.com/south-west-iceland-is-shaking-and-may-be-about-to-erupt-156510 Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 8, 2021 Author Report Share Posted March 8, 2021 From VC this evening: Its a waiting game, even fast geology takes its time. Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 10, 2021 Author Report Share Posted March 10, 2021 "GPS measurements" are amazing satellite technology able ot measure up/down and sideways motion of the ground within 1mm per day. Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 10, 2021 Author Report Share Posted March 10, 2021 satellite radar mapping InSAR gives a meassure of ground deformation https://www.usgs.gov/natural-hazards/volcano-hazards/insar-satellite-based-technique-captures-overall-deformation-picture and is being used to monitor Reykanes Here is a description on Iceland TV. Note how he counts the red rings, each representing an uplift of 20mm. Its in Icelandic but you get the gist https://www.ruv.is/sjonvarp/spila/kastljos/27725/95err4 Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 12, 2021 Author Report Share Posted March 12, 2021 Update; https://icelandgeology.net/ 12 cm uplift in some locations, and not slowing indicates magma still rising webcam list will be useful if eruption happens Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 16, 2021 Author Report Share Posted March 16, 2021 Animation of 23 days of earthquakes. Keilir the distinctive conical hill is top right. Quote Link to post Share on other sites
RobH Posted March 19, 2021 Report Share Posted March 19, 2021 (edited) Magma on the surface. Started about an hour ago but the webcams seem to have gone walkabouts - perhaps the website is unable to cope with demand. https://www.volcanocafe.org/eruption-at-reykjanes/ Edited March 19, 2021 by RobH Quote Link to post Share on other sites
Bleednipple Posted March 19, 2021 Report Share Posted March 19, 2021 Great picture from a friend in Iceland just now. Nigel Quote Link to post Share on other sites
RobH Posted March 19, 2021 Report Share Posted March 19, 2021 (edited) This webcam seems to be working but in black-and-white.: https://www.ipcamlive.com/60401b8d3413c Helicopter video: https://www.facebook.com/425701797497389/videos/1591514964571078 Edited March 19, 2021 by RobH Quote Link to post Share on other sites
RobH Posted March 20, 2021 Report Share Posted March 20, 2021 Best video yet (if you turn the loud music off!): https://www.mbl.is/frettir/sjonvarp/218414/ Quote Link to post Share on other sites
Peter Cobbold Posted March 20, 2021 Author Report Share Posted March 20, 2021 Webcam: https://www.ruv.is/frett/2021/03/20/beint-vefstreymi-fra-eldstodvunum more listed here:https://icelandgeology.net/ Quote Link to post Share on other sites
Peter Cobbold Posted March 20, 2021 Author Report Share Posted March 20, 2021 Webcam: https://www.ruv.is/frett/2021/03/20/beint-vefstreymi-fra-eldstodvunum tourists there already - on the sandy flat areas, right and left. Quote Link to post Share on other sites
Peter Cobbold Posted March 20, 2021 Author Report Share Posted March 20, 2021 9 minutes ago, Peter Cobbold said: Webcam: https://www.ruv.is/frett/2021/03/20/beint-vefstreymi-fra-eldstodvunum tourists there already - on the sandy flat areas, right and left. and just to the right of the main vent on the smooth surface, one wearing white. Quote Link to post Share on other sites
Peter Cobbold Posted March 21, 2021 Author Report Share Posted March 21, 2021 Up close yesterday Quote Link to post Share on other sites
Peter Cobbold Posted March 21, 2021 Author Report Share Posted March 21, 2021 https://www.ruv.is/frett/2021/03/20/beint-vefstreymi-fra-eldstodvunum too close: 18:02 bottom right of centre, lava surge, jumping tourist Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 21, 2021 Author Report Share Posted March 21, 2021 Blue lights are led torches of tourists. The eruption might intensify. The first magma to erupt has been hanging around in the dyke for weeks and has cooled and become more viscous. If the eruption draws on deeper hotter magma it will intensify. IIRC the upper mantle is only 15km deep here. Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 21, 2021 Author Report Share Posted March 21, 2021 JUMP !! Quote Link to post Share on other sites
Peter Cobbold Posted March 23, 2021 Author Report Share Posted March 23, 2021 From RUV The lava in Geldingadalur comes so deep from the bowels of the earth that a scientist at the Institute of Earth Sciences says it resembles a high-speed connection to the center of the mantle. The rock in the eruption has been accurately identified. It comes from much deeper than the lava that has flowed on the Reykjanes peninsula for the last seven thousand years. The lava that flows up in Geldingadalur is basalt, which is the main characteristic of the Icelandic volcanic belts. But how far below does this lava flow come from? Compared to what has erupted before in historical time in Reykjanes, this is a much more primitive prey that is most likely coming from much more depth than we have seen before, “says Sæmundur Ari Halldórsson, researcher at the Institute of Earth Sciences. This basalt is called olivine toluite and is at a depth of 17 to 20 kilometers. The earth’s crust on the Reykjanes peninsula is 17 kilometers thick. Colors in a geological map from Ísor show different lava flows on the Reykjanes peninsula. The light purple colors are lava that flowed around settlement but those that are darker; Þráinsskjaldarhraun and Stapafellshraun flowed more than seven thousand years ago. The lava in Geldingadalur is similar to the thousands of years old lava. There is noticeably more of carbon dioxide e.g. I understand then there was, for example, in Holuhraun. It is again a sign of a deep source. ” https://www.ruv.is/frett/2021/03/22/hraunkvikan-synir-beintengingu-vid-midju-mottulsins from https://www.volcanocafe.org/the-reykjanes-update/ post by Urdur 00:33 23 rd Quote Link to post Share on other sites
Peter Cobbold Posted March 23, 2021 Author Report Share Posted March 23, 2021 drone footage https://icelandmonitor.mbl.is/news/news/2021/03/22/fiery_eyes_of_fagradalsfjall_craters_video/ Quote Link to post Share on other sites
Peter Cobbold Posted March 23, 2021 Author Report Share Posted March 23, 2021 Rather quiet day today, but at 2-4 am, there was intense activity. Looks to be building now. Second webcam, of opposite side, with sound here: https://www.mbl.is/frettir/innlent/2021/03/23/beint_eldgosid_i_fagradalsfjalli/ the police evacuated the area at 5pm, as the wind had dropped risking deaths from pockets of gas Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 23, 2021 Author Report Share Posted March 23, 2021 Quote Link to post Share on other sites
Peter Cobbold Posted March 24, 2021 Author Report Share Posted March 24, 2021 4:30 am Magma is rising from the mantle 14km deep. Eruption of this type was seen in Hawaii and that lasted 32 years. Could be a long thread. Peter Quote Link to post Share on other sites
RobH Posted March 24, 2021 Report Share Posted March 24, 2021 I see that you commented on the 'volcano cafe' site about variations in activity, Peter. I noticed that too as it is almost as though things liven up in the afternoon and early morning. It might just be chance as there have only been a couple of days of observation of course, but I was speculating about gravitational influence from the moon and /or maybe extra weight from tides given the sea isn't far away - but I'm not sure that is possible. The tide tables show high tide at Rekjavik as 02:20 & 14:43 yesterday and 03:18 & 16:03 today. It will be interesting to see if the activity moves with the tide table over the next week. There is a full moon on Sunday and the tides will reach a peak height on Tuesday. Quote Link to post Share on other sites
Bleednipple Posted March 24, 2021 Report Share Posted March 24, 2021 My Icelandic friend who used to head up part of the Iceland Search and Rescue org posted this. It's an auto translate of their local safety advisory, into Polish and English. So if you're planning to be one the "people who are going to erupt" or are going to see the "fireworks", bear in mind that "Poland will humiliate", apparently, and also beware that "The Gossip Station is destroyed at 17.00 today". Made me chuckle anyway. Quote Link to post Share on other sites
Peter Cobbold Posted March 24, 2021 Author Report Share Posted March 24, 2021 15 minutes ago, RobH said: I see that you commented on the 'volcano cafe' site about variations in activity, Peter. I noticed that too as it is almost as though things liven up in the afternoon and early morning. It might just be chance as there have only been a couple of days of observation of course, but I was speculating about gravitational influence from the moon and /or maybe extra weight from tides given the sea isn't far away - but I'm not sure that is possible. The tide tables show high tide at Rekjavik as 02:20 & 14:43 yesterday and 03:18 & 16:03 today. It will be interesting to see if the activity moves with the tide table over the next week. There is a full moon on Sunday and the tides will reach a peak height on Tuesday. Rob, I recall ocean tides being discussed in the run up to Eyjaf, and it was dismissed by experts. But this eruption is very differernt from Eyjaf so maybe there is mileage in tides. Am hoping Albert responds to my VC post,he's a prof of planetary geology at Manchester. Going to be up at 2 am to watch the third cycle tonight, which will guarantee it doesnt happen !! VC is an open forum,why not join the fray. Peter Quote Link to post Share on other sites
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