Yes, the volcano is still classed as active. The last eruption was in 2005 but there have been signs of activity since then. For example, in 2007, seismic activity caused 85% of the sulphur lake to evaporate. The volcano is monitored for signs of activity. And though no activity is without risk, hiking Santa Ana Volcano El Salvador is relatively safe in terms of avoiding a volcanic eruption. Earthquakes are common in this part of the world as all of Central America sits on the Pacific Ring of Fire. Which is notorious for frequent seismic activity. However, most earthquakes are small and aren't felt by people.