Smithsonian / USGS Weekly Volcanic Activity Report

The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday and averaging 16 reported volcanoes, this is not a comprehensive list of all eruptions this week, but rather a summary of activity that meet criteria discussed in the "Criteria and Disclaimers" section below.

Volcanic activity reported here is preliminary and subject to change. Carefully reviewed, detailed narratives over longer time periods are published as reports of the Bulletin of the Global Volcanism Network available through volcano profile pages.

Smithsonian / USGS Weekly Volcanic Activity Report for the week of 6 July-12 July 2022
Name	Country	Volcanic Province	Eruption Start Date	Report Status
Ebeko	Russia	Kuril Volcanic Arc	2022 Jun 11	New
Yufu-Tsurumi	Japan	Nankai Volcanic Arc	—	New
Bezymianny	Russia	Eastern Kamchatka Volcanic Arc	2022 Mar 15	Continuing
Great Sitkin	United States	Aleutian Ridge Volcanic Arc	2021 May 25	Continuing
Karymsky	Russia	Eastern Kamchatka Volcanic Arc	2024 Jun 20	Continuing
Kilauea	United States	Hawaiian-Emperor Hotspot Volcano Group	2024 Sep 15	Continuing
Lewotolok	Indonesia	Sunda Volcanic Arc	—	Continuing
Merapi	Indonesia	Sunda Volcanic Arc	2020 Dec 31	Continuing
Nyamulagira	DR Congo	Albertine Rift Volcanic Province	2018 Apr 18	Continuing
Nyiragongo	DR Congo	Albertine Rift Volcanic Province	2002 May 17 (?)	Continuing
Pavlof	United States	Aleutian Ridge Volcanic Arc	—	Continuing
Sabancaya	Peru	Central Andean Volcanic Arc	2016 Nov 6	Continuing
Semeru	Indonesia	Sunda Volcanic Arc	2017 Jun 6	Continuing
Semisopochnoi	United States	Aleutian Ridge Volcanic Arc	—	Continuing
Sheveluch	Russia	Eastern Kamchatka Volcanic Arc	1999 Aug 15	Continuing
Stromboli	Italy	Aeolian Volcanic Arc	1934 Feb 2	Continuing
Suwanosejima	Japan	Ryukyu Volcanic Arc	2004 Oct 23	Continuing
Taal	Philippines	Taiwan-Luzon Volcanic Arc	2024 Apr 12	Continuing
Yakedake	Japan	Nankai Volcanic Arc	—	Continuing

All times are local unless otherwise stated.

Ebeko (Russia) | 6 July-12 July 2022 | New Activity / Unrest Cite this Report

Ebeko
Kuril Volcanic Arc

KVERT reported that moderate activity at Ebeko was ongoing during 1-11 July. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E) explosions generated ash plumes that rose up to 3.2 km (10,500 ft) a.s.l. and drifted NW, NE, and SE. A thermal anomaly over the volcano was identified in satellite images on 3 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Yufu-Tsurumi (Japan) | 6 July-12 July 2022 | New Activity / Unrest Cite this Report

Yufu-Tsurumi
Nankai Volcanic Arc

JMA reported that during 0247-0500 on 8 July the seismic network at Yufu-Tsurumi recorded 57 volcanic earthquakes with hypocenters 1-4 km beneath Garandake, a small lava dome on the N flank of the larger Tsurumidake lava dome at the E end of the complex. The Alert Level was raised to 2 (on a scale of 1-5) at 0510 and the public was warned to stay 1 km away from Garandake. A total of 92 volcanic earthquakes were recorded by 1100 on 8 July; no additional events were detected through 11 July.

Source: Japan Meteorological Agency (JMA)

Bezymianny (Russia) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Bezymianny
Eastern Kamchatka Volcanic Arc

KVERT reported that a thermal anomaly over Bezymianny was identified in satellite images during 1-7 July. The Alert Level remained at Yellow (the second lowest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Great Sitkin (United States) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Great Sitkin
Aleutian Ridge Volcanic Arc

AVO reported that the eruption at Great Sitkin continued during 6-12 July. Elevated surface temperatures were occasionally identified in satellite images; weather clouds sometimes obscured satellite and webcam views. Seismicity was low, and occasional local earthquakes were recorded. Sulfur dioxide emissions were possibly detected during 9-10 July. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Karymsky (Russia) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Karymsky
Eastern Kamchatka Volcanic Arc

KVERT reported that a thermal anomaly over Karymsky was identified in satellite images during 30 June and 3 and 7 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Kilauea (United States) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Kilauea
Hawaiian-Emperor Hotspot Volcano Group

HVO reported that lava continued to effuse from a vent in the lower W wall of Kilauea’s Halema`uma`u Crater during 6-12 July, entering the lava lake and flowing onto the crater floor. The lake level was variable, and occasional lava breakouts occurred along the margins. Low-level spattering from the W vent was visible on most days, with material ejected no more than 10 m above the vent. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Lewotolok (Indonesia) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Lewotolok
Sunda Volcanic Arc

PVMBG reported that the eruption at Lewotolok continued during 6-12 July. Daily white-and-gray or white, gray, and black emissions rose as high as 700 m above the summit and drifted in multiple directions. Photos in posted reports showed Strombolian activity from the crater. The Alert Level remained at 3 (on a scale of 1-4) and the public was warned to stay 3 km away from the summit crater and 4 km away from the crater on the SE flank.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Merapi (Indonesia) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Merapi
Sunda Volcanic Arc

BPPTKG reported that the eruption at Merapi continued during 1-7 July. The heights and morphologies of the SW and central lava domes were unchanged from the previous week, and seismicity remained at high levels. As many as 60 lava avalanches traveled down the Bebeng drainage on the SW flank, reaching a maximum distance of 2 km. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 3-7 km away from the summit based on location.

Source: Balai Penyelidikan dan Pengembangan Teknologi Kebencanaan Geologi (BPPTKG)

Nyamulagira (DR Congo) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Nyamulagira
Albertine Rift Volcanic Province

Thermal anomalies from lava effusion on Nyamulagira’s crater floor were identified in satellite images on 6 and 11 July.

Sources: Observatoire Volcanologique de Goma (OVG), Sentinel Hub

Nyiragongo (DR Congo) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Nyiragongo
Albertine Rift Volcanic Province

Thermal anomalies from lava effusion on Nyiragongo’s crater floor were identified in satellite images on 1, 6, and 11 July.

Sources: Observatoire Volcanologique de Goma (OVG), Sentinel Hub

Pavlof (United States) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Pavlof
Aleutian Ridge Volcanic Arc

AVO reported that the eruption at a vent on Pavlof’s upper E flank was ongoing during 5-12 July, and seismic tremor persisted. Daily elevated surface temperatures identified in satellite images were consistent with the continuing effusion of short lava flows; the lava flow was 380 m long by 27 June. Three small explosions were detected during 0315-0317 on 7 July in seismic and infrasound data. Multiple small explosions were recorded during 10-12 July. The Volcano Alert Level remained at Watch and the Aviation Color Code remained at Orange.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Sabancaya (Peru) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Sabancaya
Central Andean Volcanic Arc

Instituto Geofísico del Perú (IGP) reported moderate levels of activity at Sabancaya during 4-10 July with a daily average of 20 explosions. Gas-and-ash plumes rose as high as 2.2 km above the summit and drifted E, SE, and S. As many as six thermal anomalies originating from the lava dome in the summit crater were identified in satellite data. Minor inflation continued to be detected near Hualca Hualca (4 km N). The Alert Level remained at Orange (the second highest level on a four-color scale) and the public were warned to stay outside of a 12-km radius.

Source: Instituto Geofísico del Perú (IGP)

Semeru (Indonesia) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Semeru
Sunda Volcanic Arc

PVMBG reported that the eruption at Semeru continued during 6-12 July. At 0616 on 10 July an ash plume rose 400 m above the summit and drifted SW. The Alert Level remained at 3 (on a scale of 1-4). The public was warned to stay at least 5 km away from the summit, and 500 m from Kobokan drainages within 17 km of the summit, along with other drainages originating on Semeru, including the Bang, Kembar, and Sat, due to lahar, avalanche, and pyroclastic flow hazards.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Semisopochnoi (United States) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Semisopochnoi
Aleutian Ridge Volcanic Arc

AVO reported ongoing low-level seismicity, steam emissions, and sulfur dioxide emissions at Semisopochnoi, though no explosive activity had been detected since 12 June. The Aviation Color Code was lowered to Yellow and the Volcano Alert Level was lowered to Advisory on 7 July.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Sheveluch (Russia) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Sheveluch
Eastern Kamchatka Volcanic Arc

KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 1-7 July and the eruption was characterized by ongoing explosions, hot avalanches, and lava-dome extrusion. At 1130 local time on 12 July video and satellite images showed an ash plume drifting 12 km S at altitudes of 4-4.5 km (13,100-14,800 ft) a.s.l. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Stromboli (Italy) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Stromboli
Aeolian Volcanic Arc

INGV reported that during 4-10 July activity at Stromboli was characterized by ongoing explosions from four vents in Area N (North Crater area) and two vents in Area C-S (South-Central Crater area). Infrequent explosions from the N1 vent (Area N) ejected mostly ash, with some course material. The N2 vent (Area N) mostly emitted gases along with occasional explosions and sustained jetting. Material ejected from Area N rose no higher than about 60 m above the vents. No explosions occurred at the S1 and C vents in Area C-S; explosions that were medium-to-low intensity and frequency at the two S2 vents ejected material no higher than about 30 m.

Source: Sezione di Catania - Osservatorio Etneo (INGV)

Suwanosejima (Japan) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Suwanosejima
Ryukyu Volcanic Arc

JMA lowered the Alert Level for Suwanosejima to 2 (on a 5-level scale) on 11 July, reflecting declining activity and a reduced likelihood that tephra would be ejected farther than 1 km. The number and intensity of explosions had been variable since early April but decreased overall, and material had not been ejected beyond a 1-km radius. Eruption plume heights had occasionally exceeded 3 km above the crater rim since July 2021 but none that high had been observed since mid-April. The number of volcanic earthquakes had temporality increased on 17 May but were generally low. The public was warned to stay 1 km away from the crater.

Source: Japan Meteorological Agency (JMA)

Taal (Philippines) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Taal
Taiwan-Luzon Volcanic Arc

PHIVOLCS lowered the Alert Level for Taal to 1 (on a scale of 0-5) on 11 July, noting that during the previous two months activity was characterized by baseline levels of volcanic earthquakes, weak gas emissions, and minor surface activity. Phreatomagmatic bursts from Main Crater were last observed on 2 and 10 February and 26 March. An average of seven daily volcanic earthquakes were recorded during 1 January-31 May, and none were detected after 13 June. Deformation data since January 2020 showed overall deflation. Sulfur dioxide emissions averaged 1,214 tonnes per day during May-July, though the most recent measurement was 237 tonnes per day. Minor emissions from fumarolic vents in Main Crater continued to produce diffuse steam-rich plumes that rose as high as 2.4 km. PHIVOLCS reminded the public that the entire Taal Volcano Island is a Permanent Danger Zone (PDZ).

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

Yakedake (Japan) | 6 July-12 July 2022 | Continuing ActivityCite this Report

Yakedake
Nankai Volcanic Arc

JMA reported that after an increase in the number of small volcanic earthquakes with epicenters near Yakedake’s summit in late May, seismicity remained elevated for a few weeks. Seismicity decreased in mid-June and returned to baseline levels. The Alert Level was lowered to 1 (on a scale of 1-5) on 12 July.

Source: Japan Meteorological Agency (JMA)

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Criteria & Disclaimers

Criteria

The Weekly Volcanic Activity Report does not necessarily include all volcanic activity that occurred on Earth during the week. More than a dozen volcanoes globally have displayed more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. The Weekly Volcanic Activity Report summarizes volcanic activity that meets one or more of the following criteria:

- A volcano observatory raises or lowers the alert level at the volcano.
- A volcanic ash advisory has been released by a volcanic ash advisory center (VAAC) stating that an ash cloud has been produced from the volcano.
- A verifiable news report of new activity or a change in activity at the volcano has been issued.
- Observers have reported a significant change in volcanic activity. Such activity can include, but is not restricted to, pyroclastic flows, lahars, lava flows, dome collapse, or increased unrest.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

It is important to note that volcanic activity meeting one or more of these criteria may occur during the week, but may not be included in the Weekly Volcanic Activity Report because we did not receive a report.

Disclaimers

1. The Weekly Volcanic Activity Report is intended to provide timely information about global volcanism on a weekly basis. Consequently, the report is generated rapidly by summarizing volcanic reports from various sources, with little time for fact checking. The accuracy of the Weekly Volcanic Activity Report is dependent upon the quality of the volcanic activity reports we receive. Reports published in the Bulletin of the Global Volcanism Network are cover longer time periods and are more carefully reviewed, although all of the volcanoes discussed in the Weekly Volcanic Activity Report are not necessarily reported in the Bulletin. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. Reports are updated on the Weekly Volcanic Activity Report web page as they are received, therefore information may be included regarding events that occurred before the current report period.

2. Rapidly developing events lead to coverage that is often fragmentary. Volcanoes, their eruptions, and their plumes and associated atmospheric effects are complex phenomena that may require months to years of data analysis in order to create a comprehensive summary and interpretation of events.

3. Preliminary accounts sometimes contain exaggerations and "false alarms," and accordingly, this report may include some events ultimately found to be erroneous or misleading.

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