KVERT reported that seismic activity at Kliuchevskoi was at background levels during 13-20 July. Based on observations of satellite imagery, ash plumes drifted E on 13 July and a thermal anomaly in the crater was noted during 13-20 July. Ash plumes rose to an altitude of 5.5 km (18,000 ft) a.s.l. and drifted SE and E during 13-15 July, according to video and visual observations. Gas-and-steam plumes were observed on 12, 16, and 18 July.

The strong explosive activity at Klyuchevskoy continues. Since June 28, the strongest explosions have been generating ash columns to 10 km high and the resulting ash plume is now forming a band of ash streching as far as Alaska. The ash plume is of major concern for aircraft in the area and air traffic in the area needs to be diverted.

Strong explosive and effusive activity at Klyuchevskoy volcano continues. The activity peaked on 29-30 June when near continuous ash emissios produced ash plumes more than 10 km (or 32,000 ft) high that extended up to 300 km  to the west and south-west. 
KVERT maintains the highest level of alert for Klyuchevskoy.

8-15 June: Seismic activity about background levels. Thermal anomaly at the crater and also Strombolian and Vulcanian activity.

Kliuchevskoi continues to be active above background levels. Video and visual observations during 1-4 June show strombolian and vulcanian eruptions at the summit crater, as well as lava flows generating steam explosions where hot lava interacts with ice on the NW and SE flanks. Ash plumes rose to altitudes of 7 km (23,000 ft) a.s.l. and drifted E and SE during 1-6 June. Plumes were seen on satellite imagery drifting E and S during 1-8 June. Based on information from KVERT, the Tokyo VAAC reported that an ash plume rose to an altitude of 6.1 km (20,000 ft) a.s.l. and drifted NW on 12 June.

On 1 June the Level of Concern Color Code for Kliuchevskoi was lowered from Red to Orange.

8-25 May: Seismic activity at Kliuchevskoi continued above background levels and a thermal anomaly in the crater was detected on satellite imagery.

KVERT reported that during 11-22 May, seismic activity at Kliuchevskoi continued above background levels and a thermal anomaly in the crater was detected on satellite imagery. According to video data and visual observations, Vulcanian activity at the terminal crater and phreatic bursts at the NW flank of the volcano were observed on 11 and 16 May. Also on 11 and 16 May, ash plumes rose to 9.7 km (31,800 ft) a.s.l. and drifted E and NE, respectively. Clouds inhibited observation on other days. Ashfall was reported from the town of Klyuchi, about 30 km to the NE, during 11-12 and 16-17 May. KVERT raised the Level of Concern Color Code  from Orange to Red on 17 May.

The explosive-effusive eruption of Klyuchevsy volcano continues and the alert level has been raised to red. Ash explosions more than 10 km (32,800 ft.) ASL could occur at any time. The activity of the volcano could affect international and local aircraft.
The amplitude of volcanic tremor has increased during last few days. According to visual data from Kozyrevsk and Klyuchy, an ash plume from the central crater about 9700 m (31900 ft) ASL was observed at 03:50 UTC on May 16 extending to the North. According to satellite data, ash plumes extended for 200-600 km (125-370 mi) to the north-east, north-west, and east from the volcano this week. A large thermal anomaly was noted all days.

Based on observations and video data, KVERT reported that Strombolian activity occurred at Kliuchevskoi during 27 April-4 May.
Seismic activity continued above background levels and a thermal anomaly in the crater was detected on satellite imagery.
Mudflows and lava flows continued to advance on the NW flank. Phreatic activity and ash plumes from lava-flow fronts were noted.
Gas-and-steam plumes containing ash rose to altitudes of 6.2 km (20,400 ft) a.s.l. during the reporting period and were visible on satellite imagery drifting S and SE. Based on information from KVERT, the Tokyo VAAC reported that ash plumes rose to an altitude of 5.2 (17,000 ft) a.s.l. and drifted NE on 3 May.
According to a news article, an ash plume rose to altitudes of 5.3-5.5 km (17,400-18,000 ft) a.s.l. and drifted NE on 7 May. Ashfall was reported from the town of Klyuchi, about 30 km to the NE. The Level of Concern Color Code remained at Orange

During 13-20 April, Strombolian activity occurred at Kliuchevskoi, based on observations and video data. Seismic activity continued above background levels and a thermal anomaly in the crater was detected on satellite imagery. Fumarolic activity intensified during 15 and 17-18 April. Gas-and-steam plumes possibly containing small amounts of ash rose to altitudes of 6.3-7.2 km (20,700-23,600 ft) a.s.l. during 15 and 17-18 April and drifted in multiple directions. Based on pilot reports, satellite imagery, and observations in the Petropavlovsk-Kamchatsky Flight Information Region (FIR), the Tokyo VAAC reported several E-drifting ash plumes. They rose to altitudes of 5.2 (17,000 ft) a.s.l. and 8.8 km (29,000 ft) on 18 and 22 April, respectively. On 24 April, KVERT reported mudflows and phreatic activity at lava flow fronts on the NW flank. Resultant ash plumes rose from the lava flow fronts to an altitude of 3.5 km (11,500 ft) a.s.l. The Level of Concern Color Code remained at Orange

Based on observation and video data, lava from Kliuchevskoi flowed down the NW flank on 29 March. On 31 March, lava bombs from Strombolian activity were projected about 100-200 m above the crater. According to a news article, lava flows are interacting with snow and ice and producing vapor plumes.

Mild strombolian activity continues at Klyuchevsky volcano. Over the past weeks, explosions were observed throwing lava bombs about 50-100 m above the crater.

Weak explosive activity at Klyuchevsky began on February 15. Strombolian activity ejecting lava bombs up to 50-100 m above the crater were observed on February 16-18. According to the satellite data from Russia and USA, a thermal anomaly in the area of the terminal crater was observed.

Kamchatka's Klyuchevskoi volcano started erupting Thursday Feb. 16. KVERT reports increased seismicity and visible strong strombolian / vulcanian activity, producing jets of incandescent material to 300 m above the crater and ash plumes to an altitude of 5-6 km.

Klyuchevskoy volcano remains quiet.

The Kamchatka Volcano Eruption Response Team (KVERT) reported that seismic activity of Klyuchevsky volcano is at background level, but a thermal anomaly is visible on satellite imagery at the summit crater. The team considers the possibility of explosions that produce ash plumes that reach as high as 6 km (or 19,700 ft).

Eruptive and seismic activity at Klyuchevsky volcano, neighbour of Sheveluch (also active at the time of writing) has decreased but remains. According to press reports, strong strombolian explosions from the summit crater eject ash and blocks to up to 1000 m above the crater and lava flows are travelling down the upper flanks, interacting with ice and snow, that produce secondary ash clouds.
It cannot be excluded that stronger explosions from the summit crater occurr with no or little warning; they could produce ash plumes that reach as high as 7-8 km or 23,000-26,200 ft above sea level and travel many tens or hundreds of kilometers downwind.
Klyuchi settlement is situated between Shiveluch and Klyuchevsky and receives periodically light ash fall, but the settlement is still being regarded "safe".

As KVERT (Kamchatkan Volcanic Eruptions Response Team) reports, the eruption at Klyuchevkoy volcano in Kamtchatka has increased dramatically:
"Continuous explosions from the summitcrater could produce ash plumes that reach as high as 10 km or 32,800 ft above sea level and travel many tens or hundreds of kilometers downwind. The current activity of the volcano is very dangerous to aviation. <...> Seismic activity of the volcano has increased. <...> According to visual and video data, agas-steam plume containing some amounts of ash rose up to ~7500 m (24600ft) ASL on March 22 and up to ~ 8500 m (27,800 ft) ASL on March 23, extending to the north-west. There was ash fall at Kluchi from 18:45 till present time on March 23. According to data from AMC Yelizovo, an ash plume rising up to 7,000 m (23, 000 ft.) ASL and extending 70-80 km (44 -50 mi) to the north-west was observed by pilots of aircraft AN-72 N 71602 at 23:05UTC on March 23."