Satellite image of Semeru volcano on 4 Jan 2026Explosive 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 and is moving at 05 kts in NE direction.The full report is as follows:FVAU02 at 09:57 UTC, 04/01/26 from ADRMVA ADVISORYDTG: 20260104/1010ZVAAC: DARWINVOLCANO: SEMERU 263300PSN: S0806 E11255AREA: INDONESIASOURCE ELEV: 3657M AMSLADVISORY NR: 2026/14INFO SOURCE: CVGHM, HIMAWARI-9ERUPTION DETAILS: VA TO FL150 LAST REPORTED AT 03/2322ZEST VA DTG: 04/0950ZEST VA CLD: SFC/FL150 S0813 E11301 - S0813 E11248 - S0802 E11245 - S0754 E11254 - S0802 E11303 MOV NE 05KTFCST VA CLD +6 HR: 04/1550Z SFC/FL150 S0813 E11300 - S0812 E11247 - S0800 E11247 - S0755 E11257 - S0802 E11305FCST VA CLD +12 HR: 04/2150Z SFC/FL150 S0809 E11248 - S0756 E11248 - S0752 E11259 - S0801 E11307 - S0812 E11300FCST VA CLD +18 HR: 05/0350Z SFC/FL150 S0812 E11300 - S0809 E11247 - S0756 E11247 - S0752 E11259 - S0801 E11307RMK: VA NOT IDENTIFIABLE ON RECENT SAT IMG DUE TO MET CLOUD. GND REPORTS INDICATE INTERMITTENT DISCRETE EMISSIONS ARE ONGOING. VA HEIGHT AND MOVEMENT BASED ON GND REPORTS AND MODEL GUIDANCE. LOW CONFIDENCE IN FCST DUE TO LIGHT AND VRB WINDS.NXT ADVISORY: NO LATER THAN 20260104/1610Z=