Source: Volcano Discovery
Shiveluch (Kamchatka): The effusive and explosive activity at the volcano continue at currently relatively low levels. Occasional small avalanches occur from the active dome, but little or no glow can be seen on night-time webcam imagery, suggesting that the effusion rate is at the lower end at the moment.
Chirpoi (Kurile Islands, Russia): SVERT reported that a thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images during 18 and 20-24 July. Steam-and-gas emissions were visible drifting SW on 16 July and may have contained minor amounts of ash. Steam-and-gas emissions during 22-24 July drifted as far as 90 km N. The Aviation Color Code remained at Yellow.
(Source:Smithsonian / USGS Weekly Volcanic Activity Report 20-26 July 2016)
Bagana (Bougainville Island, Papua New Guinea): A small ash emission from the volcano was reported yesterday evening. According to Darwin VAAC, a plume at approx. 7,000 ft (2.1 km) altitude extended 35 km west from the volcano.
Sinabung (Sumatra, Indonesia): Explosive and effusive activity continue with no significant changes at relatively low level. Almost every day, the lava dome produces small to moderate ash explosions at the summit.
Semeru (East Java, Indonesia): During an ongoing tour in East Java, our small group observed glow and mild explosive (strombolian) activity from Semeru volcano’s summit crater. The lava flow in the southern ravine was inactive.
Kilauea (Hawai’i): As of yesterday evening (morning in Hawai’i), the new sea entry of the “61G” lava flow near the Kamokuna area continued to be active with and was at least 20 meters wide, spilling over the older sea cliff.
It can be expected that the sea entry will widen over time. Another lobe of the main flow has been advancing along the west margin and might hit the ocean soon as well.
At the summit and Pu’u ‘O’o crater on the eastern rift zone, no significant changes have occurred. Halema’uma’u lava lake has risen a bit again to approx. 23 m below the crater floor rim and the lava pond inside Pu’u ‘O’o is active as well.
Pavlof (Alaska Peninsula, USA): Weak eruptive activity has been observed at the volcano in the form of intense steaming and small ash emissions and the aviation color code was raised to orange yesterday.
Most likely, the summit crater vent is currently producing strombolian-type activity, possibly along with the effusion of lava flows. Seismic activity has been elevated.
According to the Alaska Volcano Observatory (AVO), “vigorous steam degassing was observed in web camera images from Cold Bay (35 miles or 60 km SW) and Black Hills (20 miles or 35 km NNE) this morning. Satellite observations and pilot reports indicate minor amounts of ash associated with the steam cloud at an altitude of less than 15,000 ft (4.5 km) above sea level.”
Colima (Western Mexico): Intermittent explosions continue at the volcano from time to time, but with comparably low intensity. No or little glow is visible from the volcano’s summit at night, suggesting that the magma column is relatively deep inside the conduit currently.
Pacaya (Guatemala): Mild strombolian activity continues from the Mackenney crater. According to a recent report, this activity ejected glowing material to 75 m above the crater and weak incandescence could be observed from the crater at night.
Fuego (Guatemala): Another intense eruptive phase with strong explosions, lava fountaining and abundant lava flow activity is in progress at the volcano.
After increasing gradually over the past week, the new so-called paroxysm (the 12th such phase in 2016 according to INSIVUMEH) started yesterday morning and seems now to be at its peak. Strombolian-type explosions and/or pulsating lava fountains eject glowing lava to 400 m or more, generating abundant glowing avalanches on the upper cone, and are accompanied by shock waves that can be felt in up to 15 km distance.
Two lava flows of each about 2000 m length are descending the Las Lajas and Santa Teresa gullies on the southeastern flank.
Nevado del Ruiz (Colombia): Sporadic, usually small ash emissions continue to occur from time to time (every few days) such as last night (s. image attached). These explosions are likely phreatic in nature, i.e. driven by steam explosions inside the currently unstable hydrothermal system heated by an underlying magma intrusion at shallow depth.
On 24 July, Washington VAAC reported a possible ash plume from Ruiz that rose to an altitude of 7.2 km (23,000 ft) a.s.l.
On 26 July, an ash plume was detected that rose to an altitude of 6.9 km (22,000 ft) a.s.l. and drifted W.
Piton de la Fournaise (La Réunion): Signs that a new eruption of the volcano in the near future could be in the making have been increasing. In a bulletin yesterday, the volcano observatory (OVPF) reported elevated seismic activity, deformation and gas emissions that are consistent with the rise of magma to shallow depths.
The recent seismic unrest began on 13 July; since then, OVPF recorded 163 shallow volcano-tectonic earthquakes (at depths within 2 km below the summit), including two swarms on 19 and 26 July, as well as 226 small collapses and rockfalls in the Dolomieu Crater.
Ambrym (Vanuatu): active lava lakes in several craters (updated 12 Jul 2016)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 28 Nov 2015)
Bristol Island (United Kingdom, South Sandwich Is): new eruption since late April 2016 (updated 21 Jul 2016)
Bromo (East Java, Indonesia): intermittent mild ash emissions (updated 29 Jul 2016)
Chikurachki (Paramushir Island): explosive activity since 27 July 2016 (updated 28 Jul 2016)
Colima (Western Mexico): intermittent mild to moderate explosions (updated 29 Jul 2016)
Copahue (Chile/Argentina): strombolian activity from new intra-crater cone (updated 4 Jul 2016)
Dukono (Halmahera): mild strombolian activity, continuous intense ash emissions (updated 12 Jul 2016)
Erebus (Antarctica): active lava lake in summit crater (updated 8 Dec 2014)
Erta Ale (Danakil depression, Ethiopia): overflowing lava lake (updated 2 Mar 2016)
Fuego (Guatemala): lava flows on S and W flanks, lava fountaining from summit vent (updated 29 Jul 2016)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 29 Oct 2015)
Kilauea (Hawai’i): new surface lava flows from breakouts N and NE of Puu Oo since 24 May 2016 (updated 28 Apr 2015)
Kliuchevskoi (Kamchatka): strombolian explosions in summit crater, active lava flows on SE flank (updated 25 Jul 2016)
Langila (New Britain, Papua New Guinea): ash emissions (updated 13 May 2016)
Masaya (Nicaragua): active lava lake ini summit crater (updated 12 Jul 2016)
Nevado del Ruiz (Colombia): intermittent mild to moderate ash emissions (updated 29 Jul 2016)
Nyiragongo (DRCongo): new vent on crater floor (updated 1 Jun 2016)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)
Pacaya (Guatemala): strombolian explosions (updated 29 Jul 2016)
Pavlof (Alaska Peninsula, USA): currently calm (updated 29 Jul 2016)
Popocatépetl (Central Mexico): degassing, sporadic explosions, slowly growing lava dome (updated 25 Jul 2016)
Reventador (Ecuador): lava flow on SW flank (updated 24 Feb 2016)
Sakurajima (Kyushu, Japan): sporadic vulcanian explosions from Minamidake and Showa crater (updated 25 Jul 2016)
Sangay (Ecuador): mild strombolian activity in summit crater (updated 20 May 2016)
Santiaguito (Guatemala): intermittent strong explosions from growing Caliente dome (updated 16 Jul 2016)
Semeru (East Java, Indonesia): growing lava dome, mild strombolian activity in summit crater (updated 29 Jul 2016)
Shiveluch (Kamchatka): growing lava dome (updated 29 Jul 2016)
Sinabung (Sumatra, Indonesia): continuing pyroclastic flows (updated 29 Jul 2016)
Stromboli (Eolian Islands, Italy): weak, intermittent strombolian explosions (updated 23 May 2016)
Turrialba (Costa Rica): near-continuous ash emissions (updated 25 Jul 2016)
Villarrica (Central Chile): lava lake in summit crater, spattering, strombolian explosions (updated 4 Apr 2016)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 13 Nov 2015)