Earthquake in Vatnajökull mountains (part of Hekla volcano system)

Today (28. November 2023) at 05:56 UTC an earthquake with magnitude of Mw3,5 took place in Vatnafjöll mountain area. This is in a area that had a magnitude Mw5,0 earthquake few years ago. This might be an aftershock.

Green star north west of Katla volcano (no earthquakes) and south east of Hekla volcano (no earthquakes).
Green star in Vatnafjöllum mountain. Copyright of this image belongs to Icelandic Met Office.

There was a small earthquake swarm following this earthquake. I haven’t seen any reports that this earthquake was felt by anyone.

Deep earthquake activity in Hekla volcano

This started on Monday (14-November-2022) with an earthquake of magnitude Mw2,0 at 25,6km depth. This depth is as deep as the crust goes in this location of Iceland. This earthquake activity has been followed by two micro-earthquakes of magnitude of Mw0,5 and Mw0,6 at 11,5 km depth.

Red dot at Hekla volcano in south Iceland. With few blue dots showing smaller older earthquakes.
Earthquake activity in Hekla volcano. Picture from Icelandic Met Office.

There are no clear or obvious signs that Hekla volcano is about to do anything. But this deep earthquake activity suggests magma movements at depth or pressure changes maybe. This is clearly not a big activity and at the writing of this article I don’t expect anything to happen.

Continued aftershock activity south of Hekla volcano

Today (21-December-2021) at 09:37 UTC an earthquake with magnitude of Mw3,0 took place south of Hekla volcano.

Green star south of Hekla volcano showing the magnitdue 3,0 earthquake
Earthquake activity south of Hekla volcano. Copyright of this image belongs to Icelandic Met Office.

This earthquake activity is an aftershock activity of the Mw5,2 earthquake that happened about one month ago. This earthquake activity is possibly going to continue for months.

Earthquake swarm in Vatnafjöll mountain (south of Hekla volcano)

Today (13-December-2021) at 16:04 UTC an earthquake swarm started in Vatnafjöll mountains. This looks like a aftershock activity from the Mw5,2 earthquake in this area few weeks back. Three earthquakes with magnitude above Mw3,0 took place. The earthquake magnitudes where Mw3,0 (at 16:04), magnitude Mw3,2 (at 16:07) and magnitude Mw3,5 (at 16:08).

Græn stjarna suður af Heklu sýnir staðsetningu jarðskjálftanna í Vatnafjöllum mountains
Earthquake activity south of Hekla volcano in Vatnafjöll mountains. Copyright of this image belongs to Icelandic Met Office.

There continues to be a risk of more aftershocks in this area. It remains a question if there is going to be a stronger earthquake activity in this area in next few weeks.


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Update on the Mw5,2 earthquake south of Hekla volcano

The earthquake today (11-November-2021) at 13:21 UTC with the magnitude of Mw5,2 seems to align it self with faults that are part of SISZ rather than being part of Hekla volcano system. The high frequency tone on 2 – 4Hz that I did see on few nearby SIL stations has started to lower again after the main earthquake. Earthquake activity in the area is currently dropping but it might increase again without warning.

Continue reading “Update on the Mw5,2 earthquake south of Hekla volcano”

Early information: Magnitude Mw5,2 earthquake in Hekla volcano system

This is early information but it seems that a magnitude Mw5,2 or larger earthquake took place in Hekla volcano system at 13:21 UTC. This might be a start of an eruption in Hekla volcano, but currently it is too early to know for sure. This is inside Hekla volcano system in a area called Vatnafjöll that have regularly erupted.

Earthquake activity in Hekla volcanos system in a area that is called Vatnafjöll. Copyright of this image belongs to Icelandic Met Office.

It is not possible to know what is going to happen next in this area. But there is a risk of a magnitude Mw7,0 earthquake. If that is going to happens is impossible to know.

Earthquake activity in Hekla volcano

Around 06:00 few minor earthquakes took place in Hekla volcano. This is unusual since Hekla volcano normally doesn’t have earthquakes until an eruption is just about to start. No eruption happened and currently there are no signs that an eruption is about to start.

Earthquake activity in western part of Hekla volcano. Shown by few orange dots on this image.
The earthquake activity in western part of Hekla volcano. Copyright of this image belongs to Icelandic Met Office.

What is going on is difficult to know but this might just be a pressure change or a fault line giving in to pressure changes. The last earthquake had the time 09:36 UTC and since then there has been no additional earthquake activity in Hekla volcano. That might change without warning as has happened before in history of Hekla volcano.

Fagradalsfjall mountain eruption

I am delaying an article about the eruption in Fagradalsfjall mountain. There might be something going on there but I don’t know what yet, if there is anything going on to start with. The area has been hidden in fog all day making estimation on what is going on impossible.