(CNN)Vanuatu has imposed a state of emergency and evacuated thousands of residents after a volcano on Ambae island erupted, blanketing much of the surrounding area in thick ash.
State of emergency in Vanuatu as volcanic ash blacks out sun
On Twitter, Minister of Foreign Affairs Ralph Regenvanu said "cabinet has reimposed the state of emergency and ordered the compulsory evacuation of the entire population of Ambae."
Ambae, which sits in the northerly cluster of islands which make up the Pacific nation of Vanuatu, is the visible portion of the massive Manaro Voui volcano, one of the most active in the world.
The entirety of the island's population -- some 11,000 people -- was evacuated in September 2017 when the volcano began erupting. At that point, the alert level was raised to 4, the second highest on the scale. It's not clear how many people returned home in the months following the evacuation.
For the current eruption, the alert level has been raised to 3, indicating a "minor eruption," according to Vanuatu's Meteorology and Geo-Hazards Department.
"The local population from Ambae and from neighboring island can hear rumbling, volcanic explosions from volcano, smelt volcanic gases, see volcanic ash and gas plume and glows over the mountain at night," the department said on July 21.
On Thursday, residents on the island said the ash was falling from the volcano so thickly that it blocked out the sun, according to Radio NZ. Photos and webcam footage showed the landscape blanketed in thick gray ash.
The government has given a period of two months for the evacuation of what is expected to be most of Ambae's population, Radio NZ reported.