Observed
Directly visible in a cited satellite image, station record, official notice, or field report.
Evidence and explanation
Scientific observations can explain the event, but they are kept separate from official warnings and response figures.
What is known
A sudden high-altitude outburst entered the Bhote Koshi system and affected the Trishuli corridor. The exact initiating mechanism remains under investigation.
Reported
Published by an identified authority or humanitarian organization, with its issue time preserved.
Preliminary
An interpretation or estimate that may change as imagery, access, and field verification improve.