菲律宾马荣火山再现小型爆炸性喷发：灰柱高1600米、3级警戒维持
菲律宾吕宋岛阿尔拜省——菲律宾火山地震研究所（PHIVOLCS）通报，马荣火山11月3日上午8时22分在山顶火山口出现小型斯特龙博利式喷发，灰柱升至火山口上方约1600米、向西南方向飘移，火山维持3级警戒。
马荣火山10月30日曾发生一次持续约6分钟的中等爆炸性喷发，灰柱高达约3000米，PHIVOLCS当天把警戒级别由2级上调至3级，意为岩浆喷发进入新阶段、危险性喷发的可能性上升。阿尔拜省当局随后疏散6公里永久危险区内的居民，Tabaco市、Camalig市与Ligao市等地1400多人进入疏散中心，社会福利部门称受助疏散人员已超过2000人。
PHIVOLCS在11月4日的24小时监测通报中说，过去一天记录到11次火山地震，3级警戒继续有效。该所负责人此前表示，若火山活动继续增强，不排除把警戒上调至4级；同时提醒，火山灰沉降区若遇强降雨，可能形成火山泥流。
PHIVOLCS重申，严禁进入马荣火山6公里永久危险区，区内可能发生落石、熔岩流、熔岩喷泉与火山碎屑密度流等危险；民航飞行员也被提醒避开火山口附近空域。
Philippine Mayon Volcano Shows Minor Explosive Activity Again: 1,600-Meter Ash Plume, Alert Level 3 Remains
Albay Province, Luzon, Philippines — The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that Mayon Volcano produced minor Strombolian activity at its summit crater at 8:22 a.m. on November 3, sending an ash plume about 1,600 meters above the crater that drifted southwest. Alert Level 3 remains in effect.
On October 30, Mayon had a moderately explosive eruption lasting about six minutes, with an ash column reaching roughly 3,000 meters. PHIVOLCS raised the alert from Level 2 to Level 3 that day, signalling a new phase of magmatic eruption and a heightened likelihood of a hazardous eruption. Albay authorities evacuated residents inside the six-kilometer Permanent Danger Zone, with more than 1,400 people from Tabaco, Camalig and Ligao moving into evacuation centers; welfare officials later said aid had reached over 2,000 evacuees.
In its 24-hour monitoring bulletin on November 4, PHIVOLCS recorded 11 volcanic earthquakes and kept Alert Level 3 in place. The institute's director has said an upgrade to Level 4 cannot be ruled out if activity intensifies, and warned that heavy rain on ash deposits could trigger lahars.
PHIVOLCS reiterated that entry into the six-kilometer Permanent Danger Zone is strictly prohibited because of possible rockfalls, lava flows, lava fountaining and pyroclastic density currents, and advised pilots to avoid airspace near the summit.
来源：菲律宾火山地震研究所
发布：GSM·美国（发布链接）
图片来源：图：马荣火山喷发资料图。CC BY-SA 4.0，经 Wikimedia Commons。 / Photo: Mayon Volcano erupting (file photo). CC BY-SA 4.0, via Wikimedia Commons.
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