Great Sitkin holds Aviation ORANGE as Mayon and Kanlaon remain elevated

A steady day of eruptions and unrest spanned Alaska, Hawaii, the Philippines, and the Andes. Great Sitkin stayed at Aviation ORANGE during its ongoing eruption, while Kilauea held at Advisory with Aviation Yellow. In the Philippines, Mayon remained at Alert Level 3 as Kanlaon and Taal stayed active, and Mexico’s Popocatepetl continued under Yellow Alert Phase 2.

United States
An eruption is ongoing at Great Sitkin (Watch / Aviation ORANGE). At Kilauea, an eruption continues under Advisory with Aviation YELLOW. Unrest is also noted at Shishaldin and Kupreanof (both Advisory / Aviation YELLOW).

Indonesia
At Lewotolok, an eruption persists (Alert Level 2 – Alert). Unrest at Alert Level 2 spans several volcanoes including Karangetang, Gamalama, Sinabung, Tambora, Dempo, Sangeang Api, Sorikmarapi, Slamet, Soputan, Iya, and Bur ni Telong. Tangkuban Parahu is at Level 1 – Normal.

Philippines
Eruptive activity continues at Mayon (Alert Level 3) and Kanlaon (Alert Level 2), while Taal remains in low-level unrest (Alert Level 1). Bulusan is also in unrest at Alert Level 1.

Mexico
Popocatepetl continues its long-running eruption under Yellow Alert – Phase 2.

South America
Eruptions are ongoing at Ecuador’s Reventador and Sangay, and at Peru’s Sabancaya.

Other
In Costa Rica, an eruption continues at Poas (Alert Level 2 – Warning), while unrest persists at Rincon de la Vieja and Turrialba (both Level 2 – Warning).

Source: Smithsonian/USGS GVP Daily Volcanic Activity Report for 4 June 2026.

Activity Summary for 4 June 2026

Volcano Country Activity Type Keynotes
Great Sitkin United States Eruption Eruption ongoing; Watch / Aviation ORANGE.
Kilauea United States Eruption Eruption ongoing; Advisory / Aviation YELLOW.
Kanlaon Philippines Eruption Eruption ongoing; Alert Level 2 – Moderate Unrest.
Lewotolok Indonesia Eruption Eruption ongoing; Alert Level 2 – Alert.
Mayon Philippines Eruption Eruption ongoing; Alert Level 3 – Increased Tendency Towards Hazardous Eruption.
Popocatepetl Mexico Eruption Eruption ongoing; Yellow Alert – Phase 2.
Poas Costa Rica Eruption Eruption ongoing; Alert Level 2 – Warning.
Reventador Ecuador Eruption Eruption ongoing; Alert Level 3 – Orange.
Sabancaya Peru Eruption Eruption ongoing; Orange Alert.
Sangay Ecuador Eruption Eruption ongoing; Alert Level 2 – Yellow.
Taal Philippines Eruption Eruption ongoing; Alert Level 1 – Low-Level Unrest.
Bulusan Philippines Unrest Ongoing unrest; Alert Level 1 – Low Level of Volcanic Unrest.
Bur ni Telong Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Dempo Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Gamalama Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Iya Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Karangetang Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Kupreanof United States Unrest Ongoing unrest; Advisory / Aviation YELLOW.
Rincon de la Vieja Costa Rica Unrest Ongoing unrest; Alert Level 2 – Warning.
Sangeang Api Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Shishaldin United States Unrest Ongoing unrest; Advisory / Aviation YELLOW.
Sinabung Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Slamet Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Soputan Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Sorikmarapi Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Tambora Indonesia Unrest Ongoing unrest; Alert Level 2 – Alert.
Turrialba Costa Rica Unrest Ongoing unrest; Alert Level 2 – Warning.
Tangkuban Parahu Indonesia Background Background activity; Alert Level 1 – Normal.

Shiveluch Volcano Volcanic Ash Advisory: VA CONTINUOUSLY OBS IN SATELLITE IMAGERY OBS VA DTG: 05/1120Z to 17000 ft (5200 m)

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 17000 ft (5200 m) altitude or flight level 170 .
The full report is as follows:

FVFE01 at 12:00 UTC, 05/06/26 from RJTD
VA ADVISORY
DTG: 20260605/1200Z
VAAC: TOKYO
VOLCANO: SHEVELUCH 300270
PSN: N5639 E16122
AREA: RUSSIA
SOURCE ELEV: 3283M AMSL
ADVISORY NR: 2026/170
INFO SOURCE: HIMAWARI-9
ERUPTION DETAILS: VA CONTINUOUSLY OBS IN SATELLITE IMAGERY
OBS VA DTG: 05/1120Z
OBS VA CLD: SFC/FL170 N5921 E15848 – N5934 E16215 – N5827 E16155 MOV

NE 5KT SFC/FL120 N5609 E15912 – N5606 E15951 – N5523 E15852 MOV SW
5KT
FCST VA CLD +6 HR: 05/1720Z SFC/FL170 N5920 E16253 – N5759 E16234 –
N5850 E15701 SFC/FL120 N5537 E16020 – N5437 E15944 – N5439 E15837 –
N5554 E15924
FCST VA CLD +12 HR: 05/2320Z SFC/FL170 N5857 E16307 – N5814 E16405 –

N5732 E16223 – N5751 E15639 – N5817 E15650 SFC/FL120 N5510 E16055 –
N5333 E15905 – N5404 E15807 – N5542 E15952
FCST VA CLD +18 HR: NO VA EXP
RMK: SOUTHERN PART OF VA[FL120] OBSCURED BY MET CLOUD.
NXT ADVISORY: 20260605/1800Z=

Fuego Volcano Volcanic Ash Advisory: LIKELY VA EMS

Volcanic Ash Advisory Center Washington (VAAC) issued the following report:

FVXX20 at 09:16 UTC, 05/06/26 from KNES
VA ADVISORY
DTG: 20260605/0913Z

VAAC: WASHINGTON

VOLCANO: FUEGO 342090
PSN: N1428 W09052

AREA: GUATEMALA

SOURCE ELEV: 12346 FT AMSL

ADVISORY NR: 2026/653

INFO SOURCE: GOES-19. WEBCAM. NWP MODELS.

ERUPTION DETAILS: LIKELY VA EMS

EST VA DTG: 05/0840Z

EST VA CLD: SFC/FL140 N1437 W09052 – N1427 W09052
– N1426 W09053 – N1432 W09101 – N1437 W09052 MOV
N 5KT

FCST VA CLD +6HR: 05/1430Z SFC/FL140 N1429 W09052
– N1427 W09052 – N1418 W09105 – N1427 W09110 –
N1429 W09052

FCST VA CLD +12HR: 05/2030Z SFC/FL140 N1429
W09052 – N1427 W09051 – N1419 W09105 – N1427
W09108 – N1429 W09052

FCST VA CLD +18HR: 06/0230Z SFC/FL140 N1429
W09110 – N1428 W09052 – N1427 W09052 – N1420
W09107 – N1429 W09110

RMK: VA EMS NOT OBS ON STLT OR WEBCAM DUE TO WX
CLD CVR. EMS OBS ON WEBCAM PRIOR TO CLD CVR MVG
NNW. NWP MDLS SUG A MORE WSW MVMT THRU T+18.
…EVANS

NXT ADVISORY: WILL BE ISSUED BY 20260605/1515Z

Lewotobi Volcano Volcanic Ash Advisory: VA TO FL140 OBS AT 05/05/0510Z MOV WNW OBS VA DTG: 05/0510Z to 14000 ft (4300 m)

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows:

FVAU05 at 05:21 UTC, 05/06/26 from ADRM
VA ADVISORY
DTG: 20260605/0530Z
VAAC: DARWIN
VOLCANO: LEWOTOBI 264180
PSN: S0833 E12246
AREA: INDONESIA
SOURCE ELEV: 1703M AMSL
ADVISORY NR: 2026/84
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL140 OBS AT 05/05/0510Z MOV WNW
OBS VA DTG: 05/0510Z
OBS VA CLD: SFC/FL140 S0832 E12248 – S0835 E12247 – S0835
E12143 – S0815 E12133 – S0802 E12153 MOV NW 20KT
FCST VA CLD +6 HR: 05/1110Z SFC/FL140 S0835 E12247 – S0835
E12144 – S0815 E12133 – S0803 E12154 – S0831 E12248
FCST VA CLD +12 HR: 05/1710Z SFC/FL140 S0835 E12248 – S0841
E12146 – S0824 E12138 – S0808 E12148 – S0831 E12248
FCST VA CLD +18 HR: 05/2310Z SFC/FL140 S0832 E12248 – S0835
E12247 – S0838 E12207 – S0831 E12139 – S0808 E12138 – S0802
E12155
RMK: VA ERUPTION IDENTIFIABLE ON CURRENT SATELLITE IMAGERY.
RECENT GROUND REPORT INDICATES ONGOING DISCRETE EMISSIONS.
HEIGHT AND MOV FROM HIMAWARI-9, VONA AND MODEL FORECAST.
NXT ADVISORY: NO LATER THAN 20260605/1130Z=

Canlaon Volcano Volcanic Ash Advisory: ERUPTION AT 20260605/0028Z FL110 EXTD SE REPORTED OBS VA DTG: 05/0030Z

Satellite image of Canlaon volcano on 5 Jun 2026

Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report:

FVFE01 at 00:49 UTC, 05/06/26 from RJTD
VA ADVISORY
DTG: 20260605/0049Z
VAAC: TOKYO
VOLCANO: KANLAON 272020
PSN: N1025 E12308
AREA: PHILIPPINES
SOURCE ELEV: 2435M AMSL
ADVISORY NR: 2026/191
INFO SOURCE: HIMAWARI-9 PHIVOLCS
ERUPTION DETAILS: ERUPTION AT 20260605/0028Z FL110 EXTD SE REPORTED
OBS VA DTG: 05/0030Z
OBS VA CLD: VA NOT IDENTIFIABLE FM SATELLITE DATA WIND FL110 360/5KT
FCST VA CLD +6 HR: NOT AVBL
FCST VA CLD +12 HR: NOT AVBL
FCST VA CLD +18 HR: NOT AVBL
RMK: WE WILL ISSUE FURTHER ADVISORY IF VA IS DETECTED IN SATELLITE
IMAGERY.
NXT ADVISORY: NO FURTHER ADVISORIES=