Volcanos

Roundup of Global Volcanic Activity:

Etna (Sicily, Italy): Lava continues to flow from the fissure vent at the eastern base of the New SE crater. Accompanied by slowly rising tremor, an overall gradual increase of the activity can be noted. The front of the old lava flow is stopped at 1660 m while the active lava flow is descending on the upper wall of the valle del Bove. Ash emission continues from the summit vent of the New SE crater.

Nishino-shima (Volcano Islands): (5 Feb) New images from an overflight on 3 February confirm that the activity on the former new island continues steadily. Over the past weeks, the vent has been feeding several active lava flow fronts, that enlarged the land covered by new lava in more or less all directions. In particular, there are two active flows relatively close to the vent which have been heading out towards the southeast and formed a small almost closed bay with green-orange discoloured water inside. The water color is a result of dissolved volcanic gasses and lava fragments in suspension. In addition to the ongoing lava effusion, strombolian explosions occur from the main vent as well, which has built a small perfectly circular cone.

San Cristobal (Nicaragua): A series of small, probably phreatic explosions occurred at the volcano's summit crater early on Tuesday. INETER indicated the activity took place between 6:41 - 8:50 local time and consisted of at least 2 explosions, which generated a small steam and ash plume rising to about 200 m height. INETER believes that these eruptions were an isolated event and not sign of a new eruptive phase with new magma involved, but most likely caused by the sudden vaporization of overheated infiltrated rain water. The alarm level of the volcano was not raised and no particular measures are planned.