Summary
The ash fell over Jakarta, covering the main airport and making it unsafe for planes.
After the wind blew the ash away, the airport reopened and flights began again.
Scientists are still watching the volcano in case it erupts more.
Volcanic ash is tiny gray particles that can damage airplane engines.
More than 300,000 travelers were affected by the airport closures.
Four smaller airports also reopened after the ash cleared.
The volcano is part of the Pacific Ring of Fire, a region with many active volcanoes.
The ash fell over Jakarta, covering the main airport and making it unsafe for planes.
After the wind blew the ash away, the airport reopened and flights began again.
Scientists are still watching the volcano in case it erupts more.
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