Archivo: Halifax Explosion blast cloud restored

Descripción: This photograph was purportedly taken 15-20 seconds after the explosion. The National Library and Archives Canada description estimates the distance from the explosion as approximately 2 kilometres (one and a quarter miles) and that it was taken at Bedford Basin, Halifax, Nova Scotia, Canada, looking south down Halifax Harbour. Photographer: unknown. The height of the blast at its peak was measured at approximately 12,000 feet (3,657.6 metres) on a sextant by Captain W. M. A. Campbell of the Canadian merchant ship, SS Acadien, approximately 24.14 km (15 mi) from the harbour approaches. In Canada - from the David Millar Collection (NLAC). In the U.S. - National Archives and Records Administration (NARA) Reference #165-WW-158A-15. Original source: Underwood & Underwood. Print only - no negative available. Reproduction service has been withdrawn in Canada (NLAC). In the U.S., reproductions are available from NARA.
Título: Halifax Explosion blast cloud restored
Créditos: Library and Archives Canada does not allow free use of its copyrighted works. See Category:Images from Library and Archives Canada.
Autor(a): DesconocidoUnknown author
Permiso: Los trabajos en el dominio público deben haber expirado su copyright en los Estados Unidos y en el país de origen para ser subidos a Commons. Si el trabajo no es un trabajo estadounidense, el archivo debe tener una marca de derechos de autor adicional indicando el estatus del copyright del país de origen.
Términos de Uso: Dominio Público
Licencia: Dominio Público
¿Se exige la atribución?: No