This 7x-speed footage captures a massive pyroclastic flow racing down Indonesia’s Mount Semeru as the volcano unleashed a powerful eruption. | AccuWeather

Time-lapse footage shows the Philippines' most active volcano erupting on Monday http://cnn.it/2EK9ic5 | CNN

Dramatic video shows bolts of lightning as a volcano spews ash up to nine miles into the air in the Philippines. The country has raised the alert level, meaning an "explosive eruption" could happen in the coming hours or days: cnn.it/35OKfBK | CNN

WATCH | Time-lapse footage ng dalawang (2) pyroclastic density current (PDC) events sa Mayon Volcano mula 12:40pm hanggang 2:05pm ngayong Biyernes, Feb. 27. Nanatili sa Alert Level 3 ang Bulkang Mayon. 🎥 PHIVOLCS-DOST | One PH

PYROCLASTIC FLOW A pyroclastic flow is a fast-moving current of extremely hot gas, volcanic ash, and rock fragments that rushes down the slopes of a volcano during explosive eruptions. These flows can reach speeds of over 320 km/h and temperatures exceeding 1,000 °C, making them one of the most dangerous volcanic hazards. Unlike lava flows, pyroclastic flows can travel great distances, destroy everything in their path, and cause widespread devastation due to their speed, heat, and suffocating as