Posted on by Jón Frímann

Strong earthquake swarm on the Reykjanes ridge

Around 21:00 UTC today (30-June-2015) a strong earthquake swarm started on the Reykjanes ridge. So far the largest earthquake had the magnitude of 4,2, this has not been reviewed so it might be larger or smaller once reviewed.

150630_2240
The earthquake swarm on the Reykjanes ridge, this earthquake activity has not been reviewed yet by Iceland Meteorological Office. Copyright of this image belongs to Iceland Meteorological Office.

150630_2240_trace
The earthquake swarm is dense as can be seen on this image. Copyright of this image belongs to Iceland Meteorological Office.

It is possible to monitor the progress of the earthquake on my geophone in Heklubyggð here.

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17 Replies to “Strong earthquake swarm on the Reykjanes ridge”

  1. is an eruption going on, because that looks like there could be, and a big one at that.

    Sorry for being an ass the last few times I have issues…

      1. For the moment…
        But the swarm looks continued, but i am not able to interpret the tremor.

  2. The swarm is magma-tectonic in nature, with no clear harmonic tremor, but definetly there is magma involved due to the nature of the region and decompression melt. But no clear eruption sign at the moment.

    1. Forgot to add: The drumplots also do not look pure tectonic.

  4. Wednesday
    01.07.2015 02:25:35 63.622 -23.747 3.5 km 5.0 99.0 14.9 km N of Eldeyjarboði

  5. UPDATED:
    Wednesday
    01.07.2015 02:25:35 63.622 -23.747 3.5 km 5.0 99.0 14.9 km N of Eldeyjarboði
    01.07.2015 02:23:54 63.728 -23.453 10.4 km 4.4 99.0 9.9 km NW of Geirfugladrangur

  6. Wednesday
    01.07.2015 11:33:39 63.820 -22.810 8.4 km 4.0 50.5 5.6 km WNW of Reykjanestá
    01.07.2015 11:33:29 63.616 -23.422 8.9 km 3.4 90.01 9.6 km SW of Geirfugladrangur

  7. Wednesday
    01.07.2015 14:00:13

    Earthquake count:

    Magnitude less than 1 in all: 166
    Magnitude 1 to 2 in all: 174
    Magnitude 2 to 3 in all: 52
    Magnitude more than 3 in all: 20
    Total: 411

    Copyright of this data belongs to Iceland Meteorological Office.

  9. Eldey has signs of heighten unrest at the moment, seismic activity still very high.

  10. Thats a methane site. Is it possible its methane clathrates erupting out of control?

  11. Thats a methane clathrates site I believe. Is it possible that methane erupting?

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