and technological risks None of the 200 communes of the Department is in the zero seismic risk zone. Digne townships are located in zone 1b (low seismicity) of the 1991 deterministic classification, based on the historic earthquakes, and in zone 4 (medium risk) according to the EC8 probabilistic classification 2011. The town of Digne is also exposed to three other natural risks: Forest fire Flooding (in the Bléone Valley) and in those of its tributaries; Land movement: all the western part of the municipality is covered by a medium to strong hazard. The town of Digne is also exposed to a risk of technological origin, that of transport of dangerous goods, by rail, road and pipeline. With regard to the railway, the is disused and has no traffic; the line from is used by passenger transport. and the RD 900 (former ) can be used for the road transport of dangerous goods. Finally, the pipeline to supply natural gas is an additional risk factor to Digne. The foreseeable natural (PPR) of the town was approved in 2008 for the risks of flooding, movement of land and earthquakes and the has existed since 2009. The commune has been the subject of several orders of natural disaster: in 1984 for an earthquake, and many times for floods, landslides and mudslides, and landslides due to drought. Also included is a flood disaster prior to the orders: The waters of the Mardaric and Eaux-Chaudes which flooded the town in 1928, and the Bléone in 1973 which partially destroyed the bridge. This destruction was caused by the breakdown of a jam created in the bed of the , causing a wave of flooding. Similarly, several massive landslides have happened in the history of the commune, for example on 24 December 1916, which caused the collapse of part of Courbons, and 2002–2003 at Villard-des-Dourbes. Earthquakes have a long history in Digne. Retaining those macro-seismic events felt higher than level V on the MSK scale (sleepers awake, falling objects), we obtain the following list (the specified intensities are those felt in the town, the intensity may be stronger at epicentre): The earthquake of 31 August 1684, an intensity felt Digne of V.5 and whose epicentre was located at Digne The earthquake of 2 December 1872, an intensity felt V and whose epicentre was located at Digne The earthquake of 20 September 1876, an intensity felt V.5 and