Volcanos

Roundup of Global Volcanic Activity

Chirpoi (Kurile Islands, Russia): A thermal anomaly continues to be visible at the summit of Snow volcano on cloud-free satellite imagery. The Aviation Color Code remains at Yellow.

Manam (Papua New Guinea): Activity at the volcano remains low, with only internal (seismic) unrest detected recently. The latest Smithsonian / USGS Weekly Volcanic Activity Report from 11-17 March 2015 writes: "RVO reported that activity at both Manam's Southern Crater and Main Crater was low during 1-18 March although inclement weather made crater observations difficult; no noises were reported. Seismicity had slowly and erratically increased since 28 February, peaked on 13 March and remained at that level through 15 March, and then increased again through 18 March. The seismicity was characterized by small-to-moderate, sub-continuous, and continuous volcanic tremor. Discrete low-frequency earthquakes were also recorded."

Ruang (North Sulawesi & Sangihe Islands): An increase in seismicity starting on 6 March prompted PVMBG to raise the Alert Level to 2 (on a scale of 1-4) on 12 March. No emissions were observed from the volcano. Residents and tourists were warned not to approach the craters within a 1.5-km radius.

Shishaldin (United States, Aleutian Islands): Seismicity at the volcano continues to be above background, and according to AVO, "low-level activity", i.e. weak strombolian activity for example, could be occurring at the summit crater. Webcam imagery show only minor steaming. Aviation Color Code remains at Orange and the Volcano Alert Level remained at Watch.

Colima (Western Mexico): Intermittent explosions and ash emissions continue, but at lower frequency and intensity as during the previous weeks. On 12 March, ash plumes rose to altitudes of 6.1-6.7 km (20,000-22,000 ft) a.s.l. and drifted E, ESE, and SE.

Ubinas (Peru): The Instituto Geofísico del Perú (IGP) and Observatorio Volcanológico del Sur (OVS) reported sporadic ash emissions on 17 March. During 10 February-17 March seismicity at Ubinas was generally low, although a hybrid event was detected on 11 March. Two main sources of seismicity were located 1 km W of the crater at depths of 1-3 km and 2 km NW at depths of 1-5 km. Water-vapor emissions rose as high as 1.5 km above the crater. Sporadic ash emissions were observed on 17 March. (from: Smithsonian / USGS Weekly Volcanic Activity Report 11-17 March 2015)