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质疑拉脱维亚“陨星坠落”

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科学家对拉脱维亚北部田野里发现的一处大坑进行调查,曾经认为是陨石坑,现在看来是一起恶作剧。

周日,消防员被当地居民召集到马兹萨拉卡镇郊外的现场,他们说天上掉下了一个东西,落地时着火了。

一位专家曾说,9米(27英尺)宽的大坑是由于撞击造成的,如今他认为是人为的。

他说,陨石撞击造成的坑不会这么规则。

这么大的陨石撞击地球是很罕见的,大部分(陨石)物质在穿越大气层时都会燃烧殆尽,很少能够达到地面。

2007年,一颗陨石落在秘鲁卡拉卡斯镇安地附近,撞击形成了一个15米(50英尺)的大坑。

“烟花火药混合物”说

周一,拉脱维亚国家火警救援中心的发言人说,有证人向消防员报告说,马兹萨拉卡附近的田地里着火了,时间是前一天17:30(格林尼治时间15:30)。

因迦维特瑞说:“我们的结论是,撞击一定来自空中,这就是为什么我们相信那是一颗陨石的原因。”一个军队也到了事发地点,他们发现放射值正常。

拉脱维亚环境、地理和气象中心的科学家厄尔迪斯奴勒说,上周日看过现场,他初步认为大坑是陨石撞击造成的。

然而,白天仔细勘察后发现,大坑很规整,不会是真正的撞击造成的。

他对美联社的记者说:“这不是真的陨石坑,是人工的。”

伦敦自然历史博物馆陨石馆馆长卡罗琳.斯密斯对BBC记者说,现场的照片和影像,还有坑底的燃烧物质都显示,那不是一个撞击坑。

她说,陨石坠落时不会“着火”,甚至不热。

“还有,周日下午在这一地区,所谓的陨石坠落时间,没有目击者报告看见任何大”火球”。”

拉脱维亚地质学家丹尼斯.奥佐斯说,他认为是有人挖了一个大坑,在坑底燃烧了一种烟花火药混合物,试图使它看起来像是一个陨石坑。

一般认为要形成那么大的一个陨石坑,陨石直径至少得有1米(3英尺)。

那块田地的主人现在售票给前来参观陨石坑的人们,报道称道路都压坏了。

译文:Doubts over Latvia 'meteor crash'

Scientists investigating a large crater in a field in northern Latvia, believed to have been caused by a meteorite, now suspect it was a hoax.

Fire crews were called to the scene on Sunday outside the town of Mazsalaca by locals who said something had fallen from the sky and set the land on fire.

One expert who had said the 9m (27ft) wide crater was caused by an impact, said he now thought it was artificial.

The hole was too tidy to have been caused by a meteorite, he said.

It would be unusual for such a large meteorite to hit the Earth, as most objects burn up in the atmosphere and never reach the surface.

In 2007, a meteorite ploughed into the countryside near the Andean town of Carancas in Peru, creating a 15m (50ft) wide crater.

'Pyrotechnic compound'

On Monday, a spokeswoman for the Latvian State Fire and Rescue Service said firefighters had been told by a witness about a fire in a field near Mazsalaca at 1730 (1530 GMT) the previous day.

"We concluded that the impact must have come from the air and this is why we believe it could have been a meteorite," Inga Vetere said.
A military unit sent to the site found normal radiation levels.

Uldis Nulle, a scientist at the Latvian Environment, Geology and Meteorology Centre, said his first impression after visiting the site late on Sunday had been that the crater was caused by a meteorite.

However, on closer inspection in daylight he found that the hole was too tidy to have been caused by a genuine impact.

"This is not a real crater. It is artificial," he told the Associated Press.

Caroline Smith, meteorite curator at London's Natural History Museum, told the BBC that the photographs and video footage of the site, and the material burning in the bottom of the hole, indicated that it was not an impact crater.

"Meteorites are not 'on fire' or even hot when they land on Earth," she said.

"Additionally, there have been no witness reports of any large 'fireball' sightings in the region on Sunday afternoon, when the crater was allegedly formed."

Latvian Geologist Dainis Ozols said he believed someone had dug a hole and tried to make it look like a meteorite crater by burning a pyrotechnic compound at the bottom.

It is thought the meteorite would have to have been at least 1m (3ft) in diameter to create a crater that size.

The owner of the land is now selling tickets to people who want to see the crater, reportedly to pay for wear and tear on the road.

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