Due to the ongoing diminished seismic activity, the aviation color code for the threatened area was lowered back to „Yellow“, The National Weather Service reported.
The Aviation Color Codes are set up by pilots in collaboration with the public and aviation authorities regarding to current conditions of volcano.
Source: mbl.is 23 November
The activity remains essentially unchanged since the last update.
On 21 November, 300 earthquakes were measured, and from midnight of 22 November until 06:00 PM that day, about 100 quakes were recorded, which is a way fewer than in previous days. Besides the diminished frequency of quakes, even a magnitude strength range hasn’t exceeded a value of > M 2.0.
The ground deformation, related to magma flux within the dike intrusion, continues at decreased levels in the area of Svartsengi region. Based on data from November 21, model calculations indicate the strongest magma supply at Sundhnúksgíga, about 4 km north-northeast of Grindavík. Only small ground movements have been detected in and around the town over the past few days.
However, even though the activity has been slowing down gradually and the likelihood of an eruption within the town area has been decreasing every day, it is important to keep in mind that there is a still existing probability of eruption to occur.
It is estimated that magma within the dike currently undergoes a process of crystalization (it solidifies) and, therefore, reduces the likelihood of an eruption on the surface within the town limits.