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tkuhmone
登録日: 2014.08.26 記事: 56
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SonotaCo Site Admin
登録日: 2004.08.07 記事: 12669 所在地: 139.67E 35.65N
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日時: Sat Dec 30, 2017 8:13 am 記事の件名: Re: Bright fireball at 22nd Dec 2017 (Finland) |
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tkuhmone wrote: | Sonic booms were heard in the near region, after some delay |
Wow... thank you for the news!
I have never heard of those.
Here, we had only one meteor in 14 years, that was recorded by sonic boom sensor and seismic network in Japan.
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tkuhmone
登録日: 2014.08.26 記事: 56
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日時: Sat Dec 30, 2017 8:27 am 記事の件名: |
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here is analysis what was soon published by URSA. It is in finnish, maybe google could translate...
https://www.avaruus.fi/uutiset/tahtiharrastus-ja-taivaanilmiot/terveisia-avaruudesta-pihtiputaalle-ja-kinnulaan-perjantai-illan-tulipallon-mallinnus-valmistui.html
I did not hear any sound(s) of this case. Mainly because I was indoors, maybe TV or radio on. But if I have been out at same time - I am quite sure sounds have been able to hear.
Based on the links analysis, the initial mass of meteor (in atmospheric entry phase) was estimated to be few tens of kilograms. If correctly remember, inital speed was little bit over 20km/sec.
If there is some fragmets on the ground (based on analysis I believe it) they will be lost...
In the wintertime most ideal location to search possible dropped fragmets, would be lake ice without any snow cover...
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