The bright object could be clearly seen from Argentina's capital of Buenos Aires. Other reports of the dazzling display came in from Brazil's southern state of Rio Grande do Sul, as well as neighboring Uruguay.
@todonoticias #cieloverde pic.twitter.com/FBbBXFWnKK
— nico capaccio (@NicoCapaccio) July 31, 2015
Most of the observers said the spectacle lasted for some 10 seconds, as the massive fireball burnt up in the atmosphere. Witnesses said no sound was heard.
Social media was subsequently bombarded with pictures, videos and GIFs of the event under the hashtag #CieloVerde.
Y si, después de 15 años me hago el dni y la naturaleza me regala un meteorito pic.twitter.com/qKJnLNH9Lk
— - Paulita ★#ARG Che (@imyourbestsong) July 31, 2015
¿Qué pasó? ¡El cielo se puso verde en Buenos Aires! http://t.co/IVTRpGVqwf pic.twitter.com/sslLCJfcFS
— TN - Todo Noticias (@todonoticias) July 31, 2015
Today there will be also "Blue full moon"
[Link] (czech article)