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夏威夷的莫纳罗亚火山,世界上最大的活火山,开始喷发

2022-11-29 11:18  -ABC   - 

夏威夷大岛上的莫纳罗亚火山开始喷发火山灰和熔岩,这是世界上最大的活火山。

活动从周日晚上11点30分左右开始,一直持续到周一,这是近40年来莫纳罗亚火山的首次喷发。

根据美国地质调查局的说法,熔岩被限制在山顶,目前对人口稠密的地区没有威胁。

然而,根据美国地质调查局的说法,火山爆发已经从山顶转移到东北裂谷带,那里的裂缝正在形成几股熔岩流,美国地质调查局建议可能受到莫纳罗亚熔岩流威胁的居民重新做好准备,并参考夏威夷县民防信息以获得进一步的指导。

熔岩流的重要性足以让几十英里外的科纳都可以看到。

莫纳罗亚火山非常大,占据了大半个大岛。上一次爆发是在1984年的3月和4月。

美国地质调查局喀斯喀特火山观测站的地球物理学家迈克尔·波兰告诉美国广播公司新闻说,自19世纪80年代以来,这座火山已经喷发了数十次,这让火山学家了解了它的“个性”。这意味着科学家预测现在流量可能会减少,因为最初的喷发通常是最严重的。

波兰说,由于喷发发生在东北部,那里山峰向海的坡度更平缓,它将需要数周的连续喷发才能到达希洛。

州长大卫·伊格尔告诉美国广播公司新闻直播,他还不担心对夏威夷人的任何影响。

“我认为现在我们并不担心,”Ige说。“火山爆发和裂缝都在很高的地方。...事实上,现在正在喷发的裂缝附近真的没有任何社区或结构。”

PHOTO: This aerial image released by the US Geological Survey (USGS)from Civil Air Patrol on Nov. 28, 2022, shows the lava on the northeast rift zone of Mauna Loa in Hawaii.

This aerial image released by the US Geological Survey (USGS)from Civil Air Patrol on Nov. 28, 2022, shows the lava on the northeast rift zone of Mauna Loa in Hawaii.

讲义/美国地质调查局/法新社通过盖蒂图片

“要使东北裂谷带的喷发到达任何类型的社区或接近任何基础设施,需要几周甚至更长时间的喷发,”州长补充道。

作为预防措施,夏威夷火山国家公园已经对游客关闭了莫纳罗亚山顶区

美国地质调查局夏威夷火山观测站发布到推特上的视频显示了熔岩从火山山顶流出的热力镜头。

根据美国地质调查局的数据,周一早上,在熔岩流的同时,该地区发生了十几次超过2.5级的地震。

根据美国地质勘探局的火山数据,熔岩仍在从山顶喷发,并在周一从火山口溢出。美国国家气象局发布了一项火山灰和碎片沉积的建议,以及船只上轻微的火山灰堆积,直到早上6点,沿着阿勒努哈哈海峡,大岛迎风水域,大岛背风水域和大岛东南水域。

NWS建议,船只应留在港口或避免咨询区域,那些对呼吸系统敏感的人应采取额外的预防措施,以尽量减少暴露。

根据NWS的说法,落下的火山灰和碎片也可能导致引擎或电子设备不起作用。

夏威夷是几座活火山的所在地,包括凯劳亚火山在世界上最活跃的大岛上。

在过去的一年里,全球各地都有火山活动的记录。

两座火山可能即将爆发俄罗斯的堪察加半岛11月20日火山灰和熔岩开始喷发后。

七月,火山爆发樱岛火山2007年,日本西南部鹿儿岛县附近的居民接到了疏散命令。

上周,海洋地质学家宣布,1月15日发生在南太平洋汤加群岛的水下火山爆发是史上最大的。

Hawaii's Mauna Loa, the largest active volcano in the world, begins erupting

Ash and lava have begun spewing out of the Mauna Loa volcano on Hawaii's Big Island -- the largest active volcano in the world.

The activity, which began Sunday around 11:30 p.m. and continued into Monday, is the first eruption from Mauna Loa in nearly 40 years.

The lava was contained to the summit, and there are currently no threats to populated areas, according to the U.S. Geological Survey.

However, the eruption has migrated from the summit to the northeast rift zone, where fissures are feeding several lava flows, according to the USGS, which advised residents at possible risk from Mauna Loa lava flows to review preparedness and refer to Hawaii County Civil Defense information for further guidance.

Lava flows are significant enough to be visible from Kona, dozens of miles away.

Mauna Loa is so large it takes up more than half of the Big Island. The last time it erupted was in March and April 1984.

The volcano has erupted dozens of times since the 1880s, allowing volcanologists to get to know its "personality," Michael Poland, research geophysicist for the USGS Cascades Volcano Observatory, told ABC News. This means that scientists are predicting that the flow will likely abate now because the initial eruptions are typically the heaviest.

Since the eruption is occurring to the northeast, where the peak's slope seaward is more gentle, it would take weeks of a continuous eruption for it to reach Hilo, Poland said.

Gov. David Ige told ABC News Live that he was not yet worried about any impact on Hawaiians.

"I think right now we're not that concerned," Ige said. "The eruptions and the fissures are very high up. ... In fact, there really is no communities or no structures anywhere close to the fissures that are erupting right now."

"It will take weeks, if not longer, of eruptions occurring in order for the Northeast Rift Zone eruption to reach any kind of community or get close to any infrastructure," the governor added.

Hawaii Volcanoes National Park has closed the Mauna Loa Summit Area to visitors as a precaution

Video posted to Twitter by the U.S. Geological Survey's Hawaiian Volcano Observatory shows thermal footage of the lava flowing out of the volcano's summit.

In conjunction with the lava flow, there were more than a dozen earthquakes in the region of more than 2.5 magnitude early Monday morning, according to the USGS.

Lava was still erupting from the summit and was overflowing from the caldera Monday, according to USGS Volcanoes. The National Weather Service issued an ashfall advisory for depositing ash and debris, as well as light accumulation of ash on vessels, until 6 a.m. along the Alenuihaha Channel, Big Island windward waters, Big Island leeward waters and Big Island southeast waters.

The NWS advised that vessels should remain at port or avoid advisory areas, and those with respiratory sensitivities should take extra precautions to minimize exposure.

Falling volcanic ash and debris can also render engines or electronics inoperative, according to the NWS.

Hawaii is home to several active volcanos, including theKīlauea volcanoon the Big Island, one of the most active in the world.

Volcano activity has been recorded all around the globe over the past year.

Major eruptions could be underway from two volcanoes onRussia's Kamchatka Peninsulaafter clouds of ash and lava began spewing on Nov. 20.

In July, an eruption at theSakurajima volcanoin Japan prompted evacuation orders for residents nearby in the southwestern prefecture of Kagoshima.

And last week, marine geologists announced that the underwater volcano eruption that occurred on Jan. 15 in the Tongan archipelago in the South Pacific Ocean is thelargest ever recorded.

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