The Philippine Institute of Volcanology and Seismology on Tuesday said it has recorded a total of 11 volcanic earthquakes in Taal volcano signifying danger nearby its crater.

According to the agency, the volcanic tremors lasted from 2 to 16 minutes with low-level background shaking in the past 24 hours and the temperature in Taal's main crater lake is at 66.5 degrees Celsius since 27 April.

Phivolcs warned anew the public that entering Taal Volcano Island and the permanent danger zone, especially in the main crater and Daang Kastila fissures, remain prohibited.

Taal recorded a moderate emission of the gas plume at 900 meters tall, drifting southwest.

Sulfur dioxide emission was measured at an average of 4,431 tons daily on 3 October.

Phivolcs said slight inflation of TVI and Western Taal Caldera, while deflation of Eastern Taal Caldera is being observed.

Hence, aircraft are not allowed to fly close to the volcano including occupancy, and boating in Taal Lake must be prohibited.

Under the low-level unrest of Taal, Phivolcs noted that hazards like steam-driven or phreatic or gas-driven explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas, are all possible.