Following up this article..Blue light observed near reactor 4
Radiation level picked up in Tokyo and Kanagawa after 20:00 4/13/2012, when the blue light was observed. It went down gradually but it picked up again toward 4/14/2012.
モニタリングポストの線量が、4/13 20:00以降、神奈川と東京で上昇しました。4号機脇でJNNライブカメラが青い光を捉えたのはおよそ19:45 4/13です。 その後線量は徐々に低下しましたが、4/14に再び上昇。当日の天気は雨でした。
It was rainy on 4/14/2012.
↓ Radiation level in Kanagawa. It has two peaks, after 20:00 4/13 and about 11:00 4/14. [Link]
↓ Radiation level in Tokyo. It has 2 peaks as well.[Link]
↓ 0.62 μSv/h in Yokohama 16:26:59 4/14/2012 [Link]
Iori Mochizuki