Volcanic activity worldwide 31 Jan 201

Source: Volcano Discovery - 1/31/13

Etna (Sicily, Italy): Etna has returned to apparent calm, but it is probably only a matter of days before new activity appears, likely at either Bocca Nuova or the New SE crater. Diffuse ash emissions seem to be occurring from the latter (see image).
The eruption last night from Bocca Nuova was the 7th eruptive episode of this kind in the summit area during the past 3 weeks. 5 of them occurred at the Bocca Nuova, whereas the other 2 came from the New Southeast Crater (INGV Catania).

In Kamchatka, no significant changes in the ongoing eruptions need to be reported. Lava effusion continues at high rate from Tolbachik volcano and lava domes continue to grow from Sheveluch Sheveluch and Kizimen volcanoes.

Rabaul (Tavurvur) (New Britain, Papua New Guinea): Intermittent mild to moderate explosive activity has continued at Tavurvur during the past week. Ash explosions and semi-continuous ash venting produced plumes rising up to about 1 km and alternated with periods of calm steaming.

Lokon-Empung (North Sulawesi, Indonesia): Explosions from the volcano have become more infrequent, but two new explosions occurred this morning at 6:54 and 10:44 am local time. The eruptions produced booms heard in the nearby villages, but due to cloud cover could not be well observed. The local volcano observatory estimated the height of the plume about 800 meters.
The eruption was preceded by strong seismic activity that started last night. PVMBG maintains alert level 3 (out of 4).

Tongariro (North Island, New Zealand): Weak earthquakes continue to occur under the volcano, but the general level of seismic activity has remained low.

White Island (New Zealand): During the recent gas-measuring flight, GNS scientists measured slightly increased levels of volcanic gas output. Seismic activity has reverted to a continuous tremor and remains at a high level, but GNS does not think a larger eruption is imminent.

Colima (Western Mexico): The volcano has been quiet so far after Tuesday's powerful vulcanian explosion that produced an ash column 3 km high and ejected many incandescent bombs onto the upper flanks of the volcano.
The current seismic signal shows some small volcanic quakes, signals of rockfalls and possibly minor explosions.

Popocatépetl (Central Mexico): The rate of emission has been about 1 per hour during 29-30 Jan.

Nevado del Huila (Colombia): Activity during the past week has not changed, characterized by degassing accompanied by normal levels of seismic activity (124 events of low energy).

Machin (Colombia): There is no surface activity, but continuing seismic unrest including some volcanic-tectonic quakes in two areas southeast of the summit come, at 2-4 km and 12-15 km depth.

Galeras (Colombia): Sporadic small steam and sometimes ash emissions continue to be observed from time to time, such as on 22 and 27 Jan. Low-energy tremor pulses accompany the emissions. Seismicity has been of low energy during the past week.

Nevado del Ruiz (Colombia): Strong degassing has produced an SO2 signal visible on yesterday's NOOA satellite data. Numerous small volcanic earthquakes and short periods of volcanic tremor continue to occur at the volcano.

Cumbal (Colombia): Seismic activity has remained low during the past week.

Sotará (Colombia): The only sign of acivtity over the past week were 4 small volcano-tectonic quakes.

Reventador (Ecuador): Seismic activity remains high, but seems to be slowly decreasing. A steam plume and weak glow from the summit could be observed yesterday.

Tungurahua (Ecuador): Numerous small volcanic earthquakes and continuous weak tremor are being recorded and there seems to be a slow increase over time as a sign that the volcano could erupt again soon. IGPEN characterizes the level of activity as "moderate".