EDM network (Fig. 1) line length increases also indicate tumescence in the region above the future eruption site.

If the intrusion does not have time to freeze before subsequent or continued injection, then the 'lubricated' region may channel magma towards the eventual eruption site.

Also there is still widespread ash in cloud layers up to 5 km from the eruption site.

However, the eruption site soon returned to normal.

Other cinders that fell father from the eruption site had time to cool down and created a cinder blanket.

While these eruptions generally have a steady eruption rate, larger outbreaks of lava have been observed at many flow-dominated eruption sites.

There was still widespread ash in cloud layers up to 5 km from the eruption site.

The field party then noticed tephra deposits in the mudflow, concluding that they were from the eruption site.

These areas, including Hat Creek Valley, are those in the immediate vicinity and downhill from likely eruption sites.

The agency reports that booming sounds were heard in Hvolsvöllur, which is about 20 miles (32 kilometers) west of the eruption site, this week.