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| In Sep. 23 (Sun.), 1990, we took at a parking lot (2,700 meters of altitude) of Mt. Norikura (3,025.6 meters of altitude) in Japan. Then, a clear egged cloud comes to flow from the right to the left sides (from the west to the east) in the front of my sight. This cloud is shown below. | 
| (If clicked, you can see by expansion.) | 
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| View of the parking area taken after this cloud has left slowly is shown below. | 
| (If clicked, you can see by expansion.) | 
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