A statement from the U.S. Geological Survey reveals that Mount St. Helens remains active and is displaying signs of long-term uplift and earthquake activity, but there are no signs of imminent eruption.

Since the conclusion of the 2004-2008 dome-constructing eruption at Mount St. Helens, scientists have been carefully observing slight inflation of the ground surface and minor earthquake activity suggestive of that observed in the years after the 1980-1986 eruptions.

“Careful analysis of these two lines of evidence now gives us confidence to say that the magma reservoir beneath Mount St. Helens has been slowly re-pressurizing since 2008,” said the USGS in a statement. “It is likely that re-pressurization is caused by arrival of a small amount of additional magma 4-8 km beneath the surface.”

However, scientists are careful to note that re-pressurization of a volcano’s magma reservoir is frequently seen at other volcanoes that have erupted recently, and it can go on for numerous years without an eruption.

The USGS and the Pacific Northwest Seismic Network will continue to observe ground deformation and seismicity at Mount St. Helens. This summer, in an effort to gain more insight into activity beneath the volcano, scientists will measure the kinds and quantities of volcanic gases being released and the strength of the gravity field at the volcano.

Mount St. Helens erupted in spectacular fashion on May 18, 1980. According to Popular Mechanics, the eruption did $1 billion in damage, killed 57 people and turned 230 square miles of forest into a “lunar wasteland.” The 1980 eruption was the first eruption in the continental U.S. outside of Alaska since 1917, CNN’s Mount St. Helens Fast Facts notes.