The NW lava flow from Central Crater reaches a length of 1 km, then stops. Explosive bursts occur at a rate of 20 per minute, sending bombs up to 600 m high, and a new cone grows in the Central Crater. May Fifth eruptive episode from Central Crater in one month. In the afternoon, explosive activity at Central Crater resumes, initiating 12 days of ininterrupted eruptions with spectacular lava overflows. At 1800, a new lava flow spills down the upper W flank, overriding the flow of the previous day, extending to the tree boundary.
Powerful explosions occur incessantly in Central Crater.
The flow is deflected to the SW at the base of Monte Frumento Supino, a cinder cone standing at ca. While the advance of the western lava flow stops, lava continues to overflow through the newly formed notch onto the SSW flank. May. Lava continues to flow to the SSW, reaching a length of 4 km. In the morning all explosive and effusive activity stops. A lava flow may have been erupted in the evening.