Semeru
FVAU02 at 11:16 UTC, 20/07/26 from ADRM
VA ADVISORY
DTG: 20260720/1120Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/823
INFO SOURCE: HIMAWARI-9, CVGHM, WEBCAM
ERUPTION DETAILS: VA TO FL150 LAST OBS AT 20/1100Z MOV E
OBS VA DTG: 20/1100Z
OBS VA CLD: SFC/FL150 S0809 E11252 - S0803 E11252 - S0800
E11321 - S0812 E11327 - S0821 E11318 MOV E 15KT
FCST VA CLD +6 HR: 20/1700Z SFC/FL150 S0809 E11252 - S0803
E11252 - S0800 E11321 - S0809 E11327 - S0817 E11320
FCST VA CLD +12 HR: 20/2300Z SFC/FL150 S0809 E11252 - S0803
E11252 - S0802 E11322 - S0812 E11327 - S0820 E11319
FCST VA CLD +18 HR: 21/0500Z SFC/FL150 S0808 E11251 - S0801
E11253 - S0804 E11324 - S0815 E11327 - S0822 E11320
RMK: DISCRETE VA IDENTIFIABLE ON CURRENT SAT IMG. GROUND
REPORTS AND WEBCAM IMAGERY INDICATE INTERMITTENT VA
ERUPTIONS ARE ONGOING. VA HEIGHT AND MOVEMENT BASED ON
SATELLITE IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260720/1720Z=
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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