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時間:2022-08-17 來源:本站 點擊:258次

Possibility of further volcanic eruptions in Tonga can't be excluded, says expert******

The volcano in Tonga might go quiet after eruption, but the possibility of further explosions can't be excluded, a British expert on volcanoes said Tuesday.。

As rescue teams continued to head to the collection of islands in the Pacific Ocean, Professor Mike Burton from the University of Manchester told Xinhua in an interview that "Because the volcano is basically submarine, we don't know what's going on."

"Almost anything could happen, and we just have to wait and see at this point," said the volcanologist at the university's Department of Earth and Environmental Sciences.。

The eruption on Saturday propelled thousands of tons of ash high into the atmosphere and set off a tsunami. Many of the roughly 170 islands around Tonga are covered with a thick layer of volcanic ash.。

The Tonga volcano, hundreds of kilometers underwater, and around 65 kilometers from Tonga's capital, is something of a mystery, said Burton, who tries to understand when a volcano might erupt by measuring the flux and composition of the often deadly poisonous gases created by volcanic activity.。

"The latest eruption which occurred on January 15 is possibly the biggest eruption we've seen for the last 30 or 40 years. I say possibly, because there are still some question marks over exactly what happened," he said.。

"It appears to be contradictory in some ways. In one sense, there's a sign that this was a very powerful, very big explosion, as it appeared to have gone up very high into the atmosphere, up to about 35 kilometers in height," Burton said.。

"To get that high in the atmosphere, you normally need a huge amount of material to erupt. But instead there's observation suggesting there wasn't that much material that erupted. This comes from both looking at the ash fallout and from the amount of gas released," he added.。

Burton said whether the main eruption is a prelude to another big eruption is yet unknown.。

The impact of the Tonga eruption was felt as far away as in Peru and Japan, and it seems to have damaged Tonga in particular, he said, adding that as the eruption seems to have severed the only communication cable into Tonga, the magnitude of the damage suffered by Tonga is still sketchy.。

Looking to the immediate future, Burton said one of the biggest threats, which isn't immediately obvious, is the risk of a deadly lava flow if there are rainstorms.。

"You can imagine if you get lots of fine ash and coarser ash landing on the ground in depths of meters, and then there's big heavy rainfall, you can get big mud flows which can be very destructive," he warned.。

As for any risk to the wider area of the Pacific Rim, Burton said it might impact ozone concentrations.。

"Because there was obviously a big interaction with seawater, it may be possible there were some unusual chemicals which were injected in great amounts into the stratosphere, things like chlorine and hydrogen chloride. It is one of the gases which can destroy ozone," he said.。

Burton said the risk of a future tsunami hitting China was now unlikely.。

"The impact of the tsunami was within 24 hours or 36 hours of the actual eruption. Now that we're three days past the eruption, the likelihood is there is no more tsunami coming out from the eruption," he said.。





  华商报小编 杨平。



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Calhanoglu shines, Inter overturns Napoli in Serie A******

ROME, Nov. 21 (Xinhua) -- Napoli also tasted its first Serie A defeat this season, one day after AC Milan, as it fumbled a 1-0 lead, only to be overturned by Inter Milan 3-2 on Sunday.。

Under the leadership of former Inter's coach Luciano Spalletti, Napoli had a perfect start to the new season, as it managed ten victories and two draws before Sunday's game, leading the table with 32 points alongside AC Milan, who suffered a 4-3 loss to Fiorentina on Saturday.。

The away side had a more aggressive start and went ahead in the 17th minute, when Nicolo Barella was caught napping, Lorenzo Insigne charged forward and squared for Piotr Zielinski to drill home from the edge of the box.。

Barella quickly atoned for his error minutes later, as the Italian international won a penalty, with Hakan Calhanoglu converting.。

The Nerazzurri turned the game around before the break, when Ivan Perisic met Calhanoglu's corner to turn in a header, Napoli's goalkeeper David Ospina clawed it back after it practically crossed the line.。

Inter extended the lead on the hour mark through a counter-attack, as Joaquin Correa dribbled across the field and his sensational pass found Lautaro Martinez who found the net with a daisy-cutter.。

Napoli pulled one goal back in the 78th minute, as when Edin Dzeko was caught in possession, substitute Dries Mertens released a missile from a distance that flew into the net.。

The Partenopei should have had the equalizer in the dying minutes, but Mario Rui saw his header at the back post palmed by Samir Handanovic.。

After the defeat, Napoli is still neck-to-neck with AC Milan on 32 points, while Inter Milan ranks third with 4 points behind.。

Also on Sunday, Jose Mourinho's change proved decisive, as the 18-year-old starlet Felix Afena-Gyan, who came off the bench in the last 20 minutes, bagged a brace to help Roma beat Genoa 2-0, ruining Andriy Shevchenko's coaching debut in Serie A.。

In Sunday's other fixtures, Venezia edged past Bologna 1-0, Sampdoria won Salernitana 2-0 away, Sassuolo shared spoils with Cagliari 2-2. Enditem。

西安疾控:接种提升针后 身体内抗体水平会迅速升高******



据西安市市疾控中心医生介绍 ,此次加强免疫的目标为对18岁及之上已接种中生北京市微生物(含成都市微生物.兰州市微生物.长春生物).北京科兴中维.武汉生物消灭疫苗且顺利完成全过程免疫力,或接种副流感病毒媒介疫苗接种满6个月的群体执行加强免疫接种。正常情况下应用已接种过的原疫苗开展加强免疫。应用同一种消灭疫苗进行两剂次接种的群体,正常情况下应用原消灭疫苗开展1剂次加强免疫;应用不一样消灭疫苗进行两剂次接种的群体,正常情况下优先选择应用与第二剂次消灭疫苗同样的疫苗开展1剂次加强免疫。如遇第二剂次同样疫苗没法再次供货等状况,可运用与第一剂次消灭疫苗同样的疫苗开展1剂次加强免疫。接种副流感病毒媒介疫苗满6个月能够应用原疫苗开展1剂次的加强免疫。




华商报新闻记者 李琳。






3.这10条迷人的中国公路 做梦都想去一次


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