![]() The Icelandic Meteorological Office noted that an eruption was possible without any strong precursory signals because the magma was already close to the surface.Īround 8:45 p.m. By early-March, seismic activity ramped up with increased earthquake counts, larger events, and seismic tremor - which was attributed to shallow magma movements at around 1–1.5 km (0.6–1 mi) depth. In February 2021, increased seismicity and a deformation signal suggested an intrusion occurred near Fagradalsfjall. Throughout the year, several more seismic swarms and intrusive episodes occurred in the area, along with a few stronger earthquakes. Scientists concluded that a magmatic intrusion had occurred at several kilometers depth based on seismic and deformation data. ![]() The current unrest along the Krýsuvík-Trölladyngja volcanic system started in January 2020 around Mount Thorbjorn with seismic activity and uplift that was beyond the typical background levels. Therefore, eruptions on the peninsula have the potential to be highly disruptive. Iceland’s international airport is located on the western end of Reykjanes Peninsula and the capital, Reykjavík, lies on the northeastern end. This region is one of the few places where the Mid-Atlantic Ridge is visible on land, with eruptions characterized by effusive lava flows and limited tephra deposits. According to the Scientific Advisory Board of the Icelandic Civil Protection, the Reykjanes Peninsula could be entering into a period of extended unrest that could include alternating seismic, deformation, and eruptive activity. Two fissure eruptions from the Krýsuvík-Trölladyngja volcanic system produced extensive lava flows that entered the ocean on the peninsulas north and south coasts. ![]() Prior to the recent activity, the last eruptive period in the area was over 800 years ago. ![]()
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