Caap to airmen: Avoid flying near Mayon following eruption

Mayon Volcano in Albay erupted moderately explosively on Friday. The eruption sent a grayish ash plume 3,000 meters above the volcano. This matters because volcanic ash can create serious hazards for aircraft operating nearby, even when pilots cannot easily see the eruption itself.

In response, the Civil Aviation Authority of the Philippines, or CAAP, issued a Notice to Airmen. A NOTAM is an official aviation notice that alerts pilots and flight operators to temporary conditions affecting safe flight. Here, it concerned flights near Mayon after the eruption and ash release.

The warning gives aviation users timely information while conditions may change. The source does not specify the exact restricted area, affected flights, or duration. Those details would depend on monitoring and official updates. The immediate action was CAAP’s Friday NOTAM following Mayon’s moderately explosive activity.

A Notice to Airmen, commonly called a NOTAM, is an official aviation message about information pilots need before or during a flight. It can warn about hazards, temporary airspace changes, or conditions affecting safe operations. Its purpose is to deliver time-sensitive information through established aviation channels.

After Mayon produced a moderately explosive eruption and a grayish ash plume, CAAP issued a NOTAM for flights near the volcano. That notice means flight crews and operators must account for the volcanic activity when planning or conducting flights. It may support avoidance or other operational decisions, depending on the notice’s details.

The source does not state the NOTAM’s exact boundaries, wording, or duration. Those details matter because volcanic conditions and winds can change. For now, the clear message is that CAAP formally alerted aviation users to a potential ash hazard near Mayon in Albay.

Mayon’s grayish ash plume reached 3,000 meters above the volcano, according to the article. The height shows that ash entered airspace used by aircraft, making aviation warnings important. The article does not give the plume’s width or the total area affected.

Volcanic ash is made of fine rock and mineral particles. Once released, wind can transport those particles away from the volcano. Stronger winds and longer-lasting eruptions can spread ash across much larger regions than the visible plume near the crater. Ash clouds may also shift direction as conditions change.

There is no single fixed size for an ash-affected area. It depends on eruption strength, plume height, particle size, wind speed, and wind direction. For Mayon, the confirmed figure is 3,000 meters vertically. CAAP’s NOTAM reflects the need to manage flight risks near the volcano while monitoring continues.

Flying through volcanic ash can threaten an aircraft’s engines and other systems. Ash particles are hard, abrasive, and can enter engines through their air intakes. They may damage components, disrupt airflow, or cause an engine to lose power. Ash can also reduce visibility and affect aircraft surfaces.

The danger is not limited to ash falling directly beside the volcano. A plume can occupy airspace along a flight path, and winds can move fine particles away from the eruption. Mayon sent a grayish plume 3,000 meters above the volcano, which explains why CAAP issued a warning for nearby flights.

The source does not report an aircraft encountering Mayon’s ash. It reports a preventive aviation response instead. Pilots and operators use official warnings to avoid hazardous airspace or adjust operations. Avoidance is important because ash may be difficult to detect visually and can cause serious damage before an aircraft exits the cloud.

Volcanic ash can remain an aviation hazard after an eruption’s visible signs fade. Fine particles may stay suspended in the atmosphere, especially when they rise high above the ground. A clear view from the surface therefore does not prove that nearby airspace is free of ash.

Winds can move ash away from the volcano and spread it along routes that are not directly above the crater. This matters at Mayon because the eruption sent a grayish plume 3,000 meters upward. Aircraft may encounter the resulting ash cloud after the original eruption is no longer obvious to people on the ground.

The article does not describe how long Mayon’s ash remained airborne or where it traveled. CAAP’s NOTAM was a timely safety measure after the moderately explosive eruption. Pilots and operators must rely on official aviation information and monitoring, rather than visibility from the ground alone, when assessing nearby airspace.

Aviation authorities decide which airspace to restrict by assessing where volcanic ash may be present and where aircraft could encounter it. They use information such as eruption activity, plume height, ash movement, and atmospheric conditions. The goal is to keep aircraft away from potentially hazardous areas while avoiding unnecessary disruption.

At Mayon, the volcano produced a moderately explosive eruption and sent a grayish ash plume 3,000 meters upward. CAAP responded by issuing a Notice to Airmen for flights near the volcano. That official notice is the mechanism that alerts pilots, dispatchers, and operators to the aviation hazard.

The source does not provide the exact boundaries or technical criteria used for this NOTAM. In practice, authorities update notices as monitoring information changes. Pilots check current NOTAMs and other official flight information before operating. For Mayon, the known action was CAAP’s Friday warning following the eruption and ash release.

An explosive eruption occurs when gas-rich magma rises and pressure builds inside a volcano. If the gas cannot escape smoothly, it expands rapidly as pressure decreases near the surface. That expansion can fragment magma into ash and propel it upward in a powerful plume.

The article reports that Mayon recorded a moderately explosive eruption in Albay on Friday. It sent a grayish ash plume 3,000 meters above the volcano. The plume formed because eruptive material was forced upward and dispersed into the atmosphere, rather than simply remaining in or near the crater.

The source does not describe Mayon’s magma, gas content, or internal pressure measurements. Those details would be needed to explain the eruption’s precise mechanics. What is clear is the observable result: explosive activity produced ash high enough to prompt CAAP to issue a NOTAM for nearby flights.