SVERT reported that a thermal anomaly over Ketoi's Pallas Peak was detected in satellite images during 5-7 and 9 August, and possibly during 10-11 August. Steam-and-gas emissions were detected on 9 August. The Aviation Color Code remained at Yellow.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)

According to news articles, a partial lava-dome collapse at Paluweh on 10 August generated a pyroclastic flow that traveled N towards a beach village and killed at least 5 people. A volcanologist at the monitoring post for Paluweh noted that the eruption lasted seven minutes, and that the pyroclastic flow burned trees around the beach and villages, making it difficult to reach the victims. Pyroclastic flows continued to be reported hours after the initial eruption. Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that an ash plume rose to an altitude of 4.3 km (14,000 ft) a.s.l. and drifted 130 km W.

News sources noted that a mandatory evacuation order had caused some residents to evacuate prior to the eruption on 10 August, but nearly10,000 still remained on the island. After the eruption, a rescue team was sent to evacuate about 2,000 people that remained inside a 3-km exclusion zone. A team member noted that rescuing people was difficult since they were reluctant to leave their livestock and homes, but also that the ground was hot and covered in 10-20 cm of ash. The VAAC reported that during 11-12 August ash plumes rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted 110-130 km W. A news article noted that the eruptions were smaller on 12 August, but pyroclastic flows continued to be observed. The Alert Level remained at 3 (on a scale of 0-4).

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC), Associated Press, CNN, Agence France-Presse (AFP), National Public Radio (NPR)

IG reported that seismic activity at Tungurahua was moderate to high during 7-13 August; the seismic network detected long-period earthquakes indicating fluid movement and some emissions. Although cloud cover mostly prevented visual observations of the crater, plumes were occasionally observed. On 8 August an ash plume rose 2 km and drifted W, and ash fell in Choglontus (SW). A small steam plume rose 100 m and drifted SW the next day. Minor vapor emissions were noted on 11 and 13 August.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

Based on information from JMA, the Tokyo VAAC reported that during 7-11 and 13 August explosions from Sakura-jima generated plumes that rose to altitudes of 1.8-4.6 km (6,000-15,000 ft) a.s.l. and drifted SE, S, and NW. On 8, 10 and 13 August pilots observed ash plumes that rose to altitudes of 2.7-3 km (9,000-10,000 ft) a.s.l., and traveled SE, S, and vertically, respectively. JMA reported that seven explosions at Showa Crater were detected during 9-12 August and ejected tephra as far as 800 m. A 50-minute-long eruption on 9 August generated an ash plume that rose 3.5 km above the crater.

Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)

Based on analysis of satellite images, SVERT reported that a thermal anomaly and gas-and-steam emissions from Chirinkotan were observed on 5 and 9 August. A thermal anomaly was visible on 7 August, and possible gas-and-steam emissions were observed on 7 and 8 August. The Aviation Color Code remained at Yellow.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)

SVERT reported that a thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images during 5-7 and 9 August, and possibly during 10-11 August. Steam-and-gas emissions were detected on 9 August. The Aviation Color Code remained at Yellow.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)

During 7-13 August HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kīlauea's Halemaʻumaʻu Crater. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas. The lake level rose during the week; the level was 49 m below the Halemaʻumaʻu crater floor on 7 August and 37-39 m below the floor during 10-12 August. The level rose to 48 m below the floor during 12-13 August.

At Puʻu ʻŌʻō Crater, glow emanated from spatter cones on the N and S portions of the crater floor. The Kahauale’a 2 lava flow, fed by the NE spatter cone, was active with scattered break-out flows and burned forest N of Puʻu ʻŌʻō. Peace Day activity, fed by lava tubes extending from Puʻu ʻŌʻō, consisted of some breakout activity on the pali and coastal plain, and an ocean entry outside of the National Park boundary to the E.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

KVERT reported that during 2-9 August moderate seismic activity continued at Kizimen. Video and satellite data showed that lava continued to extrude from the summit, producing incandescence, strong gas-and-steam activity, and hot avalanches on the W and E flanks. A thermal anomaly was detected in satellite images during 2-6 August; cloud cover obscured views on the other days. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

INSIVUMEH reported that during 7-8 August white vapor plumes rose 200 m above Pacaya and drifted E. On 9 August seismicity increased, and Strombolian explosions ejected tephra 200 m above MacKenney Crater and onto the flanks, 400 m away from crater. The next day the number and magnitudes of explosions increased, and seismic signals indicating fluid movement were recorded. Tephra was again ejected 400 m away from MacKenney Crater, causing small avalanches of volcanic material on the flanks. On 12 August fumarolic plumes rose 50 m. Cloud cover prevented observations of the crater on 13 August; however, the seismic network recorded a few gas explosions and tremor.

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)

On 8 August AVO reported that no lava or ash emissions had been observed at Pavlof since 26 June and the volcano exhibited gradually declining levels of unrest. Seismicity was at background levels. AVO lowered the Aviation Color Code to Green and the Volcano Alert Level to Normal.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

IG reported that during 7-8 August explosions at Reventador ejected incandescent material onto the SW flank. Steam emissions were observed on 8 and 9 August, and on 10 August they contained ash and rose 1 km above the crater. Cloud cover prevented observations during 11-13 August; roaring was reported on 13 August.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

INSIVUMEH reported that two explosions on 7 August from Santa María's Santiaguito lava-dome complex were followed by white plumes that rose 500 m. Pyroclastic material descended the E, S, and SW flanks. Fumarolic plumes rose 100 m on 8 August. On 10 August white plumes rose 250 m. An explosion at 0624 generated an ash plume that rose 900 m and drifted SW, causing ashfall in Monte Claro (S). Heavy rainfall on 11 August caused a lahar in the San Isidro-Tambor River, a tributary of Samala River, which was 30 m wide, 1.5 m thick, and carried branches, tree trunks, and blocks up to 1.5 m in diameter. A few explosions on 13 August generated ash plumes that rose 1 km and drifted 10 km WSW.

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)

Based on visual observations and analyses of satellite data, KVERT reported that during 2-9 August a viscous lava flow effused on the NW flank of Shiveluch's lava dome, accompanied by hot avalanches, incandescence, and fumarolic activity. Satellite images detected a thermal anomaly during 3-6, 8, and 10-11 August. Explosions during 4-5 August generated ash plumes that rose to altitudes of 5-7 km (16,400-23,000 ft) a.s.l. and drifted SSE. A video camera recorded ash plumes that rose to altitudes of 7-7.5 km (23,000-24,600 ft) a.s.l. during 10-11 August. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

KVERT reported that the S fissure along the W side of Tolbachinsky Dol, a lava plateau on the SW side of Tolbachik, continued to produce very fluid lava flows during 2-9 August that traveled to the W, S, and E sides of the plateau. Cinder cones continued to grow along the S fissure and weak gas-and-steam plumes were observed. A thermal anomaly on the N part of Tolbachinsky Dol was visible daily in satellite imagery. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

AVO reported that during 7-11 August seismicity at Veniaminof remained above background levels. Cloud cover obscured views of the cinder cone inside the caldera during 7-8 August. Slightly elevated surface temperatures, consistent with cooling lava flows, were detected in partly cloudy satellite images during 9-10 August. On 11 August cloud cover prevented satellite image views, and web-camera views showed nothing significant. During 11-12 August seismic tremor increased and persistent elevated surface temperatures, consistent with lava effusion, were visible in satellite imagery. The web camera in Perryville (32 km SSE) recorded intermittent steam-and-ash plumes; one on 12 August rose 3.7 km (12,000 ft) a.s.l. and drifted W. Seismic tremor has remained high on 13 August. The Volcano Alert Level remained at Watch and the Aviation Color code remained at Orange.

Source: US Geological Survey Alaska Volcano Observatory (AVO)