Semeru
FVAU02 at 18:19 UTC, 31/05/26 from ADRM
VA ADVISORY
DTG: 20260531/1820Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/619
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL150 OBS AT 31/1800Z MOV SW
OBS VA DTG: 31/1800Z
OBS VA CLD: SFC/FL150 S0807 E11259 - S0838 E11218 - S0823
E11154 - S0757 E11203 - S0801 E11257 MOV SW 10KT
FCST VA CLD +6 HR: 01/0000Z SFC/FL150 S0806 E11259 - S0842
E11218 - S0830 E11154 - S0805 E11159 - S0800 E11256
FCST VA CLD +12 HR: 01/0600Z SFC/FL150 S0806 E11300 - S0841
E11230 - S0828 E11203 - S0803 E11207 - S0759 E11257
FCST VA CLD +18 HR: 01/1200Z SFC/FL150 S0805 E11300 - S0841
E11231 - S0830 E11206 - S0806 E11206 - S0759 E11257
RMK: DISCRETE VA EMISSION IDENTIFIABLE ON LATEST SAT IMAGERY
MOV SW. VA HEIGHT AND MOVEMENT BASED ON SAT IMG, GND REPS
AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260601/0020Z=
Semeru
Semeru, the highest volcano on Java, and one of its most active, lies at the southern end of a volcanic massif extending north to the Tengger caldera. The steep-sided volcano, also referred to as Mahameru (Great Mountain), rises above coastal plains to the south. Gunung Semeru was constructed south of the overlapping Ajek-ajek and Jambangan calderas. A line of lake-filled maars was constructed along a N-S trend cutting through the summit, and cinder cones and lava domes occupy the eastern and NE flanks. Summit topography is complicated by the shifting of craters from NW to SE. Frequent 19th and 20th century eruptions were dominated by small-to-moderate explosions from the summit crater, with occasional lava flows and larger explosive eruptions accompanied by pyroclastic flows that have reached the lower flanks of the volcano.
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