As experts forecasted, Alaska’s Mount or Volcano Redoubt erupted again. On Saturday, the volcano sent an ash plume 50,000 feet into the air.

According to data from the Alaska Volcano Observatory in Anchorage, Mount Redoubt erupted powerfully at 1:20 a.m. Saturday and then had a less powerful eruption at 2 p.m. Experts said the volcanic ash resulted from the eruption will most likely move north toward the Alaska Range. Fortunately, it will miss Anchorage, the main city of Alaska located about 100 miles from Mount Redoubt.

After the eruption, there was strong seismic activity lasting 20 minutes or more and then an hours-long low-level tremor, caused by the venting of the volcano, said Chris Waythomas, a geologist at the observatory.

However, some of the volcanic ash landed near and in Anchorage. Local authorities closed the city’s airport, the Federal Aviation Administration said according to CNN. All flights to and from Anchorage on Tuesday were cancelled. The volcanic ash is very dangerous to the airplane’s engines, usually making it get stuck and ending in a crash. Since the series of eruptions began, the airline canceled more than 150 flights affecting an estimated 10,000 passengers.

These eruptions are the latest in a series of volcanic eruptions that started on March 22. The region was on high alert as the Alaska Volcano Observatory set the alert level at red (the highest) and warned that the eruption will produce a "significant emission of volcanic ash into the atmosphere."

"There is likely a lot of water vapor, which turns to ice which gives the plumes this whitish appearance but there is still a lot of ash in there," he said.