<div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>A major volcanic eruption in </span><a href="https://www.9news.com.au/indonesia" rel="" target="_blank" title="Indonesia"><span>Indonesia</span></a><span> has triggered an aviation warning in Australia, though so far no flights have been affected.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Indonesia's Mount Semeru, the highest peak on Java island, erupted yesterday, blanketing several villages with falling ash, prompting evacuations and leading authorities to raise the alert to the highest level.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The volcano unleashed searing clouds of hot ash and a mixture of rock, lava and gas that travelled up to 7km down its slopes several times from midday to dusk, while a thick column of hot clouds rose 2km into the air, Indonesia's Geology Agency said in a statement.</span></div></div><div><div id="adspot-mobile-medium"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE:</span></strong><span> </span><a href="https://www.9news.com.au/national/man-ordered-to-turn-in-il-duce-licence-plates/1e2ca54d-06e5-4567-8a59-f68e70c4b31f" rel="" target="_blank" title=""><strong><span>NSW man ordered to turn in plates featuring WWII dictator's nickname</span></strong></a><strong><span></span></strong></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The Bureau of Meteorology issued a volcanic ash advisory warning for Darwin in the wake of the eruption.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The eruptions that unfolded throughout the day forced authorities to raise the volcano's alert level twice, from the third-highest level to the highest, Indonesia's Geology Agency said. </span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>No casualties have been reported.</span></div></div><div><div class="OUTBRAIN" data-reactroot="" data-src="//www.9news.com.au/world/mount-semeru-volcano-erupts-indonesia-flight-disruption-australia/aa8550e5-ccba-46ba-a433-ea620c4da1c2" data-widget-id="AR_5"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>More than 300 residents in the three villages most at risk in the district of Lumajang were evacuated to government shelters, said National Disaster Mitigation Agency's spokesperson Abdul Muhari.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE:</span></strong><span> </span><a href="https://www.9news.com.au/national/australia-sanctions-russian-cybercrime-network-provider/66473a90-0083-4a68-a315-ea6385801d44" rel="" target="_blank" title=""><strong><span>Australia imposes sanctions on Russian cyber firms over ransomware attacks</span></strong></a><strong><span></span></strong></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>He said increased activity of the volcano on Wednesday afternoon prompted authorities to widen the danger zone to 8km from the crater. </span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>People were advised to keep away from an area along the Besuk Kobokan River, which is the path of the lava flow as searing gas flowed down Semeru's slopes.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Videos on social media showed a dense cloud of ash sweeping through a forested valley to a river beneath a bridge. </span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Residents, some with faces smeared with volcanic dust and rain, fled to temporary shelters or left for other safe areas.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Local media reported that authorities are struggling to rescue about 178 people stranded on the 3676m mountain at the Ranu Kumbolo monitoring post. </span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The group includes 137 climbers, 15 porters, seven guides and six tourism officials, according to an official with the Bromo-Tengger-Semeru National Park, TNBTS.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE:</span></strong><span> </span><a href="https://www.9news.com.au/national/meta-to-block-instagram-and-facebook-accounts-early/7d7cbc1e-39f7-43c0-9aea-a96c858d2073" rel="" target="_blank" title=""><strong><span>Meta to start closing teenage accounts weeks before social media ban starts</span></strong></a><strong><span></span></strong></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"They are currently safe at Ranu Kumbolo monitoring post," Endrip Wahyutama, a TNBTS spokesperson, said in video statement, adding that the post is located 4.5km from the crater on the northern slope of the mountain, which is not in the path of the hot cloud flow that was observed moving to south-southeast. </span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Bad weather and rain forced them to spend the night there, he said.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Semeru, also known as Mahameru, has erupted numerous times in the past 200 years. Still, as is the case with many of the 129 active volcanoes in Indonesia, tens of thousands of people continue to live on its fertile slopes.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Semeru's last major eruption was in December 2021 when it left 51 people dead and several hundred others burned in villages that were buried in layers of mud. The eruption forced the evacuation of more than 10,000 people. The government moved about 2970 houses out of the danger zone.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Indonesia, an archipelago of more than 280 million people, sits along the Pacific "Ring of Fire," a horseshoe-shaped series of fault lines, and is prone to earthquakes and volcanic activity.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><a href="https://www.9news.com.au/national/how-to-follow-9news-digital/29855bb1-ad3d-4c38-bc25-3cb52af1216f" target="_blank"><strong><em><span>DOWNLOAD THE 9NEWS APP</span></em></strong></a><strong><em><span>: Stay across all the latest in breaking news, sport, politics and the weather via our news app and get notifications sent straight to your smartphone. 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