Ulawun Volcano Volcanic Ash Advisory: continuous ash emissions to 20000 ft (6100 m)

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Wellington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 and is moving at 20 kts in SW direction.
The full report is as follows:

FVAU04 at 12:53 UTC, 01/10/19 from NZKL
VA ADVISORY
DTG: 20191001/1255Z
VAAC: DARWIN
VOLCANO: ULAWUN 252120
PSN: S0503 E15120
AREA: PAPUA NEW GUINEA
SUMMIT ELEV: 2334M
ADVISORY NR: 2019/49
INFO SOURCE: HIMAWARI-8, GROUND REPORT, PIREP
AVIATION COLOUR CODE: RED
ERUPTION DETAILS: CONTINUOUS EMISSION TO FL200 EXT SW
OBS VA DTG: 01/1255Z
OBS VA CLD: SFC/FL200 S0503 E15123 - S0459 E15119 - S0504
E15106 - S0524 E15017 - S0553 E15028 - S0533 E15106 - S0516
E15115 MOV SW 20KT
FCST VA CLD +6 HR: 01/1855Z SFC/FL200 S0503 E15123 - S0540
E15059 - S0554 E15023 - S0524 E15016 - S0459 E15120
FCST VA CLD +12 HR: 02/0055Z SFC/FL200 S0503 E15123 - S0459
E15119 - S0528 E15029 - S0547 E15038 - S0539 E15106
FCST VA CLD +18 HR: 02/0655Z SFC/FL200 S0502 E15122 - S0536
E15117 - S0542 E15048 - S0526 E15037 - S0500 E15118
RMK: CONTINUOUS PLUME VISIBLE ON LATEST SAT IMAGERY EXT SW.
WEAK VA SIGNAL IN RGB IMAGERY SUGGESTS PLUME IS ASH POOR.
HOTSPOT VISIBLE ON SW FLANK OF VOLCANO. FURTHER ERUPTIONS TO
HIGHER LEVELS REMAIN POSSIBLE. HEIGHT BASED ON IR TEMP OF
-4C AT 01/1220Z.
NXT ADVISORY: NO LATER THAN 20191001/1855Z