Taal Volcano in the Philippines has been erupting for three days, blasting steam, ash and debris up a half mile in the sky. And it shows no signs of stopping. Experts tell TIME that they are watching closely for signs that a larger eruption could be brewing. Taal has a history of deadly explosions and is one of the more active explosive volcanoes in the world. On Tuesday morning, approximately 50 earthquakes were detected in the region near the Taal Volcano, which is about 40 miles south of Manila.