Tag: Hekla

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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.

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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.

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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.