Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report:FVFE01 at 08:37 UTC, 21/03/26 from RJTDVA ADVISORYDTG: 20260321/0837ZVAAC: TOKYOVOLCANO: MAYON 273030PSN: N1315 E12341AREA: PHILIPPINESSOURCE ELEV: 2462M AMSLADVISORY NR: 2026/356INFO SOURCE: HIMAWARI-9 PHIVOLCSERUPTION DETAILS: ERUPTION AT 20260321/0702Z VA CLD UNKNOWN REPORTEDOBS VA DTG: 21/0820ZOBS VA CLD: VA NOT IDENTIFIABLE FM SATELLITE DATA WIND FL180 020/9KTFCST VA CLD +6 HR: NOT AVBLFCST VA CLD +12 HR: NOT AVBLFCST VA CLD +18 HR: NOT AVBLRMK: WE WILL ISSUE FURTHER ADVISORY IF VA IS DETECTED IN SATELLITE IMAGERY.NXT ADVISORY: NO FURTHER ADVISORIES=

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 16000 ft (4900 m) altitude or flight level 160 .The full report is as follows:FVXX22 at 07:55 UTC, 21/03/26 from KNESVA ADVISORYDTG: 20260321/0754ZVAAC: WASHINGTONVOLCANO: REVENTADOR 352010PSN: S0005 W07739AREA: ECUADORSOURCE ELEV: 11686 FT AMSLADVISORY NR: 2026/278INFO SOURCE: GOES-19. NWP MODELS. VOLCAT. ERUPTION DETAILS: VA EMS OBSOBS VA DTG: 21/0710ZOBS VA CLD: SFC/FL160 S0003 W07740 - S0005 W07720- S0011 W07720 - S0005 W07740 - S0003 W07740 MOVE 10KT FCST VA CLD +6HR: 21/1300Z SFC/FL160 S0003 W07740- S0007 W07655 - S0016 W07656 - S0007 W07740 -S0003 W07740 FCST VA CLD +12HR: 21/1900Z SFC/FL160 S0003W07739 - S0011 W07655 - S0022 W07658 - S0006W07740 -…

World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 21 Mar 2026 Number in brackets indicate nr of quakes.Quakes detected near: Atka (2 quakes between mag 0.4-1.9), Bobrof (1 quake mag 1.4), Brennisteinsfjöll (8 quakes between mag 0.0-1.1), Campi Flegrei (Phlegrean Fields) (8 quakes between mag 0.1-1.1), Clear Lake (28 quakes between mag 0.2-1.4), Coso (4 quakes between mag 1.0-1.3)Cuilapa-Barbarena (1 quake mag 2.8), Etna (1 quake mag 1.1), Gamalama (1 quake mag 3.1), Hiuchi (1 quake mag 3.0), Ibu (2 quakes between mag 2.7-3.6), Irazu (1 quake mag 1.2), Katla (4 quakes between mag 0.0-1.3), Katmai (4 quakes between mag 0.0-1.3), Kilauea (5 quakes between mag 1.7-2.0),…

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 .The full report is as follows:FVXX21 at 07:24 UTC, 21/03/26 from KNESVA ADVISORYDTG: 20260321/0723ZVAAC: WASHINGTONVOLCANO: SANGAY 352090PSN: S0200 W07820AREA: ECUADORSOURCE ELEV: 17342 FT AMSLADVISORY NR: 2026/304INFO SOURCE: GOES-19. WEBCAM. NWP MODELS. ERUPTION DETAILS: VA EMS OBSOBS VA DTG: 21/0640ZOBS VA CLD: SFC/FL200 S0159 W07820 - S0159 W07808- S0204 W07807 - S0202 W07820 - S0159 W07820 MOVE 15KT FCST VA CLD +6HR: 21/1230Z SFC/FL200 S0157 W07724- S0208 W07723 - S0204 W07820 - S0158 W07821 -S0157 W07724 FCST VA CLD +12HR: 21/1830Z SFC/FL200 S0149W07724 - S0201 W07723 - S0203 W07820 - S0158W07822 -…

An earthquake of magnitude 4.5 occurred in the morning on Saturday, March 21st, 2026, at 7:51 am local time near Argostoli, Kefallonia, Ionian Islands, Greece, as reported by the European-Mediterranean Seismological Centre (EMSC).According to preliminary data, the quake was located at a very shallow depth of 5. km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.Our monitoring service identified a second report from the National Observatory of Athens (NOA) which listed the quake at magnitude 4.1. Other agencies…

The Japan Meteorological Agency (JMA) reported that the eruption continued at Aira between 16 March 2026 (local) and 20 March 2026 (local). The alert level remained at "Level 3 - Restriction on proximity to the volcano" (on a 5-level scale). Source: Japan Meteorological Agency (JMA)Current Alerts:Observatory alert level: "Level 3 - Restriction on proximity to the volcano" (on a 5-level scale)Aviation Alert Level: unavailable or not collectedAdapted from: Smithsonian / USGS Daily Volcanic Activity Report for Mar 20, 2026

The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Dukono on 20 March 2026 (local). Gas and vapor plume(s) rose to a maximum of 100 m (328 ft) above the vent. The alert level remained at "Level 2 - Alert" (on a 4-level scale). Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)Current Alerts:Observatory alert level: "Level 2 - Alert" (on a 4-level scale)Aviation Alert Level: unavailable or not collectedAdapted from: Smithsonian / USGS Daily Volcanic Activity Report for Mar 20, 2026

The United States Geological Survey - Alaska Volcano Observatory (USGS-AVO) reported that the eruption continued at Great Sitkin between 19 March 2026 (local) and 20 March 2026 (local). The alert level remained at "Watch" (level 3 on a 4-level scale). The aviation alert level remained at "Orange" (level 3 on a 4-level scale). Source: United States Geological Survey - Alaska Volcano Observatory (USGS-AVO)Current Alerts:Observatory alert level: "Watch" (level 3 on a 4-level scale)Aviation Alert Level: "Orange" (level 3 on a 4-level scale)Adapted from: Smithsonian / USGS Daily Volcanic Activity Report for Mar 20, 2026