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		</div><p>An ongoing eruption of a remote volcano in Alaska’s Aleutian Islands produced an ash cloud so large on Tuesday that warnings were sent to pilots about potentially dangerous conditions.</p>
<p>The ash cloud with an initial height of around 5.5 miles was drifting south-southeast from Shishaldin Volcano, the Alaska Volcano Observatory said.</p>
<p>The eruption was described as moderate with ashfall drifting towards the Pacific Ocean, creating a potential concern for air traffic or boats, said Matt Loewen, a research geologist with the US Geological Survey at the observatory.</p>
<p>The volcano is about 700 miles south-west of Anchorage and sits near the middle of Unimak Island.</p>
<p>The island’s 65 or so residents live about 25 miles north-east of the volcano, in the community of False Pass.</p>
<p>Shishaldin Volcano began erupting on July 11.</p>
<p>A US coast guard overflight confirmed lava erupted the same day within the summit crater.</p>
<p>A significant explosion early on Friday produced an ash cloud that reached up to 7.5 miles and drifted south over the Pacific Ocean.</p>
<p>A second smaller explosion occurred later on Friday.</p>
<p>The volcano, one of the most active in the Aleutian arc, saw increased lava eruptions just after midnight on Tuesday, with no significant ash emissions, the observatory said.</p>
<p>That changed hours later with the ash cloud.</p>
<p>The National Weather Service issued an advisory due to the drifting ash cloud.</p>
<p>Volcanic ash is angular and sharp and has been used as an industrial abrasive.</p>
<p>The powdered rock can cause a jet engine to shut down.</p>
<p>Shishaldin is a symmetric cone with a base diameter of 10 miles, the observatory said.</p>
<p>The 660ft funnel-shaped crater often emits steam and an occasional amount of ash.</p>
<p>There have been at least 26 confirmed eruptions at Shishaldin Volcano since 1824.</p>
<p>Most are small, but the observatory said a 1999 eruption produced an ash cloud that reached 8.5 miles.</p>
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