Map of today's active volcanoesShiveluch (Kamchatka): (4 Apr) Volcanic Ash Advisory Center Washington (VAAC) issued the following report: NOT PROVIDEDMayon (Luzon Island, Philippines): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTION AT 20260404/1837Z VA CLD UNKNOWN REPORTED OBS VA DTG:04/1830ZSemeru (East Java, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .The full report is as follows: VA TO FL150 OBS ON SAT MOV SW 04/1820Z EST VA DTG:04/1820Z to 15000 ft (4600 m)Marapi (Western Sumatra, Indonesia): (3 Apr) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA RECORDED ON SEISMOGRAM.Dukono (Halmahera): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 10000 ft (3000 m) altitude or flight level 100 and is moving at 05 kts in SW direction.The full report is as follows: VA TO FL100 OBSERVED ON SAT IMAGERY EXT SW OBS VA DTG:04/1520Z to 10000 ft (3000 m)Fuego (Guatemala): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EMISSIONS NOT DETECTEDSangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 22000 ft (6700 m) altitude or flight level 220 .The full report is as follows: OCNL VA EMS to 22000 ft (6700 m)Reventador (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .The full report is as follows: ONGOING VA EM to 15000 ft (4600 m)Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: NO VA EMS