Hundreds of earthquakes are detected in Alaska every week, but new research reveals some earthquakes are happening continuously and could encourage larger quakes.

Seismologists at the University of California Riverside looked at data from one area south and east of Dutch Harbor in the Alaska-Aleutian Subduction Zone.

They found more than 1,000 low-frequency earthquakes happened in a two-month time span, along with on-going tremors that last days to years.

Researchers say they move too slowly for humans to feel but could provide insight into how more dangerous quakes work in these areas.

“These slow earthquakes should also be given some attention because they could encourage more damaging earthquakes,” said Iqbal Pittalwala, UC Riverside School of Medicine, Life Sciences Public Information Officer.

The research team says to better understand how earthquakes work within the subduction zone, more data and additional research is needed.

“They have already taken the next step by installing three additional seismic arrays in a nearby island in the region to simultaneously image the subduction fault and the volcanic system in order to create a denser data set,” said Pittalwala.

The Alaska-Aleutian subduction zone is over 2,000 miles long and seismologists say is one of the most active in the world.