| 词条 | Ice circle of Vana-Vigala |
| 释义 |
"type": "FeatureCollection", "features": [ { "type": "Feature", "properties": {}, "geometry": { "type": "Point", "coordinates": [ 24.262521, 58.778248 ] } } ]} The ice circle of Vana-Vigala is a natural phenomenon appearing on the Vigala River in Estonia while the river freezes.[1] It can be seen in Vana-Vigala village near the old manor park.[2] The diameter of the disk is approximately 23[3]–24[4] m. The first documented mention of this phenomenon is in 2004.[4] References1. ^Olev Kenk: [https://novaator.err.ee/896073/fotod-ja-video-vigala-jaaratas-hakkas-taas-poorlema "Fotod ja video: Vigala jääratas hakkas taas pöörlema"] novaator.err.ee, January 9th, 2019 2. ^Heleri Kuris, Ats Nukki: Interaktiivne skeem: kuidas tekib Vana-Vigala jõe salapärane jääketas? Delfi, 11. jaanuar 2019 3. ^Jaan Viska: Jääratas pöörlemas Vana-Vigalas – mitte ainult kylauudis.ee, 11. jaanuar 2017 4. ^1 Eve Heinla: [https://www.ohtuleht.ee/151820/vigala-joel-poorleb-mustiline-jaaratas Vigala jõel pöörleb müstiline jääratas] Õhtuleht, January 2004 1 : Snow or ice weather phenomena |
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