Here's a Finnish preliminary analysis: http://www.avaruus.fi/uutiset/tahtiharrastus-ja-taivaanilmiot/kuolan-tulipallon-lentorata-selvisi-putoamisalue-venajan-ja-norjan-rajan-lahella.html It seems very likely that something survived. This analysis places the expected debris area in Russia a few km from the Norwegian border. -- Steinar