The Latest on the eruption of Kilauea volcano on the Big Island of Hawaii (all times local):

11:30 a.m.

Officials in Hawaii say volcanic emissions from the summit at Kilauea volcano on the Big Island have decreased, prompting the cancelation of an ash fall advisory.

The Hawaiian Volcano Observatory says there are occasional bursts of ash coming from the crater. The burst causes the ash to fall downwind to several communities, but there's only trace amounts.

Earthquakes continue to shake the Big Island, with the most severe at around 8:30 a.m. producing a 4.4 magnitude quake. The Pacific Tsunami Warning Center says there is no tsunami alert at this time.

Scientists say earthquakes may shake loose rocks underground and open up new tunnels for lava to flow.

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8:00 a.m.

A geophysicist says a plume that's rising from the Kilauea volcano summit on Hawaii's Big Island does not contain as much ash as it did on Tuesday.

Mike Poland with the U.S. Geological Survey said Wednesday the plume seems to be made largely of rock dust.

Because there's little wind, the plume for the most part is rising vertically over the summit.

USGS scientists will not monitor the plume from a summit observatory because of fears of falling ash.

Instead, they will operate from a backup command center at the University of Hawaii at Hilo.

Warnings to pilots are still in place because of the plume that reached 12,000 feet (3,658 meters) Tuesday.

The volcano has been spewing lava from fissures that opened up on its flanks for two weeks.