Friday update on Bárðarbunga volcano 26-September-2014

This is the Friday 26-September-2014 update on Bárðarbunga volcano. This information is going to get outdated quickly.

Current status in Bárðarbunga volcano at 20:31 UTC

  • Largest earthquake today had the magnitude 5,2, it happened at 16:49 UTC. Second largest earthquake today took place at 18:54 UTC and had the magnitude of 4,3. There have so far been fewer larger earthquakes today than in last days.
  • The caldera dropped 30cm in the magnitude 5,2 earthquake. The caldera continues to drop around 50cm/day according to GPS measurements. Total caldera drop is now around 29 meters.
  • Smaller earthquakes have been taking place in Bárðarbunga volcano. This means the drop is continuing during those earthquakes.
  • Magma continues to flow into Bárðarbunga volcano around the same rate as before. This can be seen on GPS data on nearby GPS monitoring stations. For GPS information please check University of Iceland GPS information page here.
  • Bad sandstorm was in Holuhraun today. It was so bad that it was only possible to see 50 – 100 meters in front of people according to Rúv news earlier today.
  • The eruption in Holuhraun continues in the same manner today as yesterday. The lava field is now larger than 40 square kilometres. What the exact size is I don’t know since it is not known today due to weather.
  • Earthquake activity continues under the dyke and that suggests the pressure is increasing in it.
  • Currently there is no eruption under the glacier. If it was it would be visible on SIL stations around Vatnajökull glacier.
  • Nothing more has happened in Bárðarbunga volcano today far as I know. That might change without warning.
  • Storms are expected to take place in Iceland all weekend. There is going to be around three or four storms taking place this weekend with strong winds up to 20m/s and it can go up to 40m/s in wind gusts. This is going to effect SIL stations and my geophones as the storms pass over parts of Iceland.

Current status Saturday 27-September-2014 at 20:30 UTC

  • No major change has taken place today in the eruption in Holuhraun. There is also no sign that is ending. Most of the eruption takes place in one crater at the moment. New fissures might open up without warning in the area where the dyke is located.
  • Bárðarbunga caldera continues to drop around 50cm/day.
  • Largest earthquake today so far is a magnitude 5,2 that took place at 19:31 UTC. Second largest earthquake today was at 02:00 and had the magnitude of 5,0.
  • Due to snowstorm there is almost no visibility to the eruption area in Holuhraun. For the people in the field the visibility today was reported to be 50 to 100 meters.
  • There has been a lot of smaller earthquakes taking place in Bárðarbunga volcano. Some of those earthquakes are taking place due to caldera subsiding. Some of those earthquakes are taking place because the magma inside Bárðarbunga volcano is looking for a new pathway up the surface. It either has not found it or does not have the pressure yet to go up the crust yet.
  • There is less activity today in the dyke. There is however worrying earthquake activity in the dyke at the start of Dyngjujökull glacier. It might mean that magma is trying to get up to the surface. There already have been eruptions under the glacier in this area without any earthquake activity before they started. All of those eruptions lasted for a short period of time.
  • Nothing else is to report so far today (27-September-2014).

Update Sunday 28-September-2014 at 17:17 UTC

  • Largest earthquake today took place at 12:34 UTC. Other earthquakes have been smaller today.
  • Bárðarbunga caldera has dropped 7,4 meter since 12-September-2014 according to GPS measurements in the centre of the caldera. That GPS data can be found here.
  • The lava field is now 44,5 square kilometres wide. It is now larger than Mývatn (around 40 square kilometres wide) for comparison.
  • Harmonic tremor suggest that pressure is increasing in the Bárðarbungu volcano magma chamber. It drops once the magma finds way out, then it starts building up again.
  • No other information have been released today. Other activity is the same as for the past few days.

Storm notice!

Three bad storms are expected in Iceland in next few days. In parts of Iceland wind is expected to go up to 50m/s in wind gusts. This is going to effect all earthquake recording and monitoring of Bárðarbunga volcano.

Next update

Next update is going to be on Monday 28-September-2014. I wish everyone a good weekend.

Article updated at 20:31 UTC on 27-September-2014
Article updated at 17:17 UTC on 28-September-2014

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