Semeru
FVAU02 at 10:45 UTC, 15/08/26 from ADRM
VA ADVISORY
DTG: 20260815/1050Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/929
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL150 OBS AT 15/0230Z MOV WNW
EST VA DTG: 15/1030Z
EST VA CLD: SFC/FL150 S0802 E11301 - S0812 E11301 - S0815
E11236 - S0800 E11229 - S0748 E11241 MOV W 05KT
FCST VA CLD +6 HR: 15/1630Z SFC/FL150 S0802 E11301 - S0812
E11301 - S0825 E11241 - S0814 E11228 - S0757 E11237
FCST VA CLD +12 HR: 15/2230Z SFC/FL150 S0802 E11301 - S0812
E11301 - S0825 E11241 - S0814 E11228 - S0757 E11237
FCST VA CLD +18 HR: 16/0430Z SFC/FL150 S0807 E11302 - S0825
E11255 - S0816 E11230 - S0753 E11234 - S0758 E11257
RMK: VA NOT IDENTIFIABLE ON CURRENT SAT IMG DUE TO MET
CLOUD. GROUND REPORTS INDICATE INTERMITTENT ERUPTIONS ARE
ONGOING. VA HEIGHT AND MOVEMENT BASED ON PAST SATELLITE
IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260815/1650Z=
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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