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MULTI-ALTITUDE VOLCANIC ASH MOVEMENT ANALYSIS REPORT
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Generated at: 2026-04-05 21:46:29 UTC
Source: VAAC BOM Darwin Australia
Resolution: Natural Earth 10m
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VOLCANO: IBU
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Location: 1.48°N, 127.63°E
Region: INDONESIA
Last Update: 2026-04-05 14:26 UTC
Number of Altitude Levels: 1
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ALTITUDE LEVEL 1: SFC/FL070
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Area Coverage Analysis:
  Current (T+0h): 2,152.67 km²
  Forecast (T+6h): 1,659.46 km²
  Forecast (T+12h): 1,834.31 km²
  Forecast (T+18h): 1,574.71 km²

Area Change Summary:
  Initial area (Current): 2,152.67 km²
  Final area (Last Forecast): 1,574.71 km²
  Minimum area: 1,574.71 km²
  Maximum area: 2,152.67 km²
  Total change: -577.96 km² (-26.8%)

Movement Analysis:

  Period 0h-6h:
    Distance covered: 6.61 km
    Calculated direction: 46.3°
    Calculated speed: 1.10 km/h
    Reported direction: SW
    Reported speed: 10.0 KT

  Period 6h-12h:
    Distance covered: 7.55 km
    Calculated direction: 333.3°
    Calculated speed: 1.26 km/h
    Reported direction: None
    Reported speed: None KT

  Period 12h-18h:
    Distance covered: 9.85 km
    Calculated direction: 357.5°
    Calculated speed: 1.64 km/h
    Reported direction: None
    Reported speed: None KT

  Movement Summary for SFC/FL070:
    Maximum speed: 1.64 km/h
    Total distance: 24.01 km
    Maximum area: 2,152.67 km²

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VOLCANO: SEMERU
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Location: 8.10°S, 112.92°E
Region: INDONESIA
Last Update: 2026-04-05 14:06 UTC
Number of Altitude Levels: 1
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ALTITUDE LEVEL 1: SFC/FL150
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Area Coverage Analysis:
  Current (T+0h): 5,922.71 km²
  Forecast (T+6h): 6,071.67 km²
  Forecast (T+12h): 5,772.92 km²
  Forecast (T+18h): 5,840.41 km²

Area Change Summary:
  Initial area (Current): 5,922.71 km²
  Final area (Last Forecast): 5,840.41 km²
  Minimum area: 5,772.92 km²
  Maximum area: 6,071.67 km²
  Total change: -82.30 km² (-1.4%)

Movement Analysis:

  Period 0h-6h:
    Distance covered: 1.11 km
    Calculated direction: 282.0°
    Calculated speed: 0.18 km/h
    Reported direction: SW
    Reported speed: 5.0 KT

  Period 6h-12h:
    Distance covered: 1.76 km
    Calculated direction: 38.3°
    Calculated speed: 0.29 km/h
    Reported direction: None
    Reported speed: None KT

  Period 12h-18h:
    Distance covered: 1.54 km
    Calculated direction: 159.3°
    Calculated speed: 0.26 km/h
    Reported direction: None
    Reported speed: None KT

  Movement Summary for SFC/FL150:
    Maximum speed: 0.29 km/h
    Total distance: 4.41 km
    Maximum area: 6,071.67 km²

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VOLCANO: DUKONO
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Location: 1.70°N, 127.90°E
Region: INDONESIA
Last Update: 2026-04-05 14:36 UTC
Number of Altitude Levels: 1
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ALTITUDE LEVEL 1: SFC/FL100
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Area Coverage Analysis:
  Current (T+0h): 3,220.43 km²
  Forecast (T+6h): 3,502.48 km²
  Forecast (T+12h): 2,585.91 km²
  Forecast (T+18h): 2,098.28 km²

Area Change Summary:
  Initial area (Current): 3,220.43 km²
  Final area (Last Forecast): 2,098.28 km²
  Minimum area: 2,098.28 km²
  Maximum area: 3,502.48 km²
  Total change: -1,122.15 km² (-34.8%)

Movement Analysis:

  Period 0h-6h:
    Distance covered: 3.71 km
    Calculated direction: 315.8°
    Calculated speed: 0.62 km/h
    Reported direction: SW
    Reported speed: 10.0 KT

  Period 6h-12h:
    Distance covered: 14.48 km
    Calculated direction: 24.1°
    Calculated speed: 2.41 km/h
    Reported direction: None
    Reported speed: None KT

  Period 12h-18h:
    Distance covered: 16.10 km
    Calculated direction: 336.7°
    Calculated speed: 2.68 km/h
    Reported direction: None
    Reported speed: None KT

  Movement Summary for SFC/FL100:
    Maximum speed: 2.68 km/h
    Total distance: 34.29 km
    Maximum area: 3,502.48 km²

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OVERALL SUMMARY
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Total altitude levels analyzed: 3
Volcanoes with multi-altitude data: 3

Highest recorded speed: 2.68 km/h
Largest area coverage: 6,071.67 km²
Total distance all clouds: 62.71 km

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END OF REPORT
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