Judging from webcams, there is no visible volcanic activity at the fissure that opened this morning just north of Grindavík. Only a few faint glows can be seen here and there on the fissure and in the lava field. However, seismic activity and deformation due to magma movements are still being measured at the northeastern end of the magma tunnel that formed today. In total, seismic activity has been measured in an area of about 20 km, measured from the southern end of the volcanic fissure to the point where the seismic activity is currently greatest. The seismic activity is still at considerable depth and there is no sign that the magma that is moving is seeking the surface. According to model calculations this afternoon, it was estimated that about 15 million cubic meters of magma had flowed from Svartsengi into the magma tunnel under the Sundhnúk crater series and only a fraction of that amount has returned to the surface. Before the eruption began, about 22 million cubic meters had been added to the magma accumulation area under Svartsengi from the last eruption and it is therefore possible that there is still room for further magma movements. While seismic activity and deformation in the magma chamber continue to be measured, it must be assumed that a new volcanic fissure could open. It is most likely that this opening would occur in the areas where seismic activity is currently highest. If an eruption were to occur, it is possible that it would be accompanied by considerable seismic activity, which, for example, would be felt by residents of Vogar.
Updated 1 April 9:40pm
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