| (1) | VOLCANO OBSERVATORY NOTICE FOR AVIATION - VONA | ||
| (2) | Issued | : | 20230313/2250Z |
| (3) | Volcano | : | Merapi (263250) |
| (4) | Current Aviation Colour Code | : | ORANGE |
| (5) | Previous Aviation Colour Code | : | orange |
| (6) | Source | : | Merapi Volcano Observatory |
| (7) | Notice Number | : | 2023MER005 |
| (8) | Volcano Location | : | S 07 deg 32 min 31 sec E 110 deg 26 min 31 sec |
| (9) | Area | : | Special Region of Yogyakarta, Indonesia |
| (10) | Summit Elevation | : | 9498 FT (2968 M) |
| (11) | Volcanic Activity Summary | : | Eruption with volcanic ash cloud at 2250 UTC (0550 local). |
| (12) | Volcanic Cloud Height | : | Best estimate of ash-cloud top is around 14298 FT (4468 M) above sea level or 4800 FT (1500 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer. |
| (13) | Other Volcanic Cloud Information | : | Ash cloud moving from east to southeast. Volcanic ash is observed to be gray to brown. The intensity of volcanic ash is observed from medium to thick. |
| (14) | Remarks | : | Eruption recorded on seismogram with maximum amplitude 70 mm and maximum duration 160 second. Ash cloud generated by pyroclastic density currents. |
| (15) | Contacts | : | Center for Volcanology and Geological Hazard Mitigation (CVGHM). Tel: +62-22-727-2606. Facsimile: +62-22-720-2761. email : pvmbg@esdm.go.id |
| (16) | Next Notice | : | A new VONA will be issued if conditions change significantly or the colour code is changes. Latest Volcanic information is posted at VONA | MAGMA Indonesia Website. Link: https://magma.esdm.go.id/vona |
