Grimsvotn (Iceland)

The Icelandic Meteorological Office raised the Aviation Color Code for Grímsvötn to Yellow on 30 September, noting that activity had been increasing over time and was above background levels. The report stated that seismicity increased over the past month, cauldrons had deepened in several places around the caldera signifying increased geothermal activity, surface deformation surpassed the level prior to the 2011 eruption, and magmatic gases were present in emissions over the summer. Additionally, water levels in the subglacial lake were comparable to levels prior to floods in 2004 and 2010.

Source: Icelandic Meteorological Office (IMO)

GVP