A spate of solar activity means that the northern lights may be visible as far south as Oregon, Nebraska and Pennsylvania this weekend.

The sun emitted its most powerful solar flare in seven years on Thursday night, a cosmic event forecasted to create views of the northern lights across the U.S. this weekend, reports Live Science. Views of the northern lights are most likely to be visible this weekend in northern U.

For prime northern lights viewing in the United States, the strongest activity is expected to arrive late Saturday into Sunday, per Thursday’s forecast by the National Oceanic and Atmospheric Administration (NOAA). Clouds may also clear through the night to provide good vantages for the majority of the country.