Chile monitors volcanic field after seismic swarm causes 160 quakes in 2 hours

SANTIAGO (Reuters) -A seismic swarm that caused 160 quakes in two hours at the Laguna del Maule volcanic field in central Chile earlier this week has put authorities and citizens on alert. The volcanic complex, located about 300 km (190 miles) south of the capital near the Argentine border, is a vast 500 square km (193 square miles) area with volcanic domes, cones and lava flows with an estimate