An underwater volcanic eruption occurred in Tonga, a South Pacific island country, during the day local time (January 15), and the shock wave generated was transmitted to the distance through the atmosphere. Hong Kong, about 9,000 kilometers away, recorded an abnormal air pressure last night. The Hong Kong Observatory stated that it would not cause any damage to Hong Kong. Influence.
As for the tsunami brought by the volcanic eruption to the Pacific region, the water level in Amami, Japan recorded an increase of about 1.2 meters last night, while the water level in Hong Kong did not change significantly.
The volcanic eruption has caused a lot of discussion last night. The director of the Observatory, Cheng Chuming, pointed out that the large-scale volcanic eruptions in the past can temporarily drop the global temperature. In addition, it is affected by the La Niña phenomenon. He believes that the global temperature change in the coming year is worthy of attention.
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Tonga volcano eruption tsunami triggers Hong Kong Observatory: Hong Kong water level has not changed significantly
An undersea volcano erupted in the South Pacific, causing Tonga to be hit by waves more than a metre high.
The sound of the Hunga Tonga-Hunga Ha'apai volcanic eruption spread throughout the South Pacific, as far as the United States; the United States and Japan both warned in advance, calling for people living along the Pacific coastline people far from the coast.
The Hong Kong Observatory said there would be no impact on Hong Kong.
As for the tsunami brought by the volcanic eruption to the Pacific region, the water level in Amami, Japan recorded an increase of about 1.2 meters last night, while the water level in Hong Kong did not change significantly.
Shockwave arrives in Hong Kong 8 hours after volcano eruption
The head of the observatory, Shun Zhiming, said on Facebook that after 8 o'clock last night, the automatic weather stations of the observatories recorded a pressure change of about 2 hectopascals, which is believed to be caused by the shock wave of the Tonga submarine volcano eruption at noon yesterday, and added that the shock wave was Propagating in the atmosphere at a higher speed than sound waves, not related to tsunamis.
Shun Zhiming said on Facebook that after 8 o'clock last night, the automatic weather stations of various observatories recorded a pressure change of about 2 hectopascals, which is believed to be caused by the shock wave of the Tonga submarine volcano eruption at noon yesterday.
(File photo / Photo by Lu Yiming)
The volcanic eruption once caused the global average temperature to drop by half a degree. Front desk director Shun Zhiming: waiting for experts to assess the impact
Shun Zhiming, referring to online information, pointed out that the shock wave speed of this volcanic eruption exceeded 1,000 kilometers per hour, and Hong Kong was 9,000 kilometers away from Tonga, and the shock wave arrived in Hong Kong in 8 hours.
He said that based on past experience, the 1991 eruption of Mount Pinatubo (the second largest volcanic eruption in the 20th century) brought a large amount of aerosols (mainly sulfur dioxide) into the stratosphere, causing the global average temperature to drop by about half a degree in the next two years. As for whether the Tonga submarine volcanic eruption has the same level, how much material and what material entered the stratosphere, it still needs to be evaluated by volcano experts and climate experts.
Fang Zhigang, director of the Underground Observatory, also pointed out that the intensity of this volcanic eruption is likely to be equivalent to the eruption of Mount Pinatubo in the Philippines in 1991, which may affect the global climate; and the IPCC report in August last year predicted that there would be a large volcanic eruption, or affect the rate of climate change.
The Hong Kong Observatory said that the underwater volcanic eruption will not affect Hong Kong, and the water level in Hong Kong has not changed significantly.
(Hong Kong Observatory fb picture)
Volcanic eruption Gala Nina Zheng Chuming pays attention to global temperature changes in the coming year
The Hong Kong Observatory explained on Facebook today that although abnormal air pressure has been recorded, it will not affect Hong Kong, and the water level has not changed significantly due to the tsunami.
The director of the Observatory, Cheng Chuming, also pointed out on social networking sites that large-scale volcanic eruptions in the past can temporarily drop global temperatures, and the current Tonga submarine volcanic eruption happens to be affected by the La Niña phenomenon this winter and spring. Temperature changes deserve attention.
Zheng Chuming pointed out that large-scale volcanic eruptions in the past can temporarily drop global temperatures, and that, in addition to being affected by the La Niña phenomenon, he believes that global temperature changes in the coming year are worthy of attention.
(File photo/Photo by Zeng Ziyang)
Tonga Volcano: The picture shows a satellite image released by the Japan Information and Communication Research Institute on January 15, showing the eruption of the Tonga volcano.
(AP)
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