The approximate wavelength range of the X-ray portion of the electromagnetic spectrum, 10 to 10 metre, corresponds to a range of photon energies from about 100 eV (electron volts) to 1 MeV (million electron volts).
Lochnagar Crater history. The Lochnagar Crater (Lochnagar Mine Crater) located in the village of La Boisselle in Franceâs Picardie region, is the site where one of the first explosions of the Battle of the Somme took place on 1 July 1916.irections to Lochnagar Crater: Lochnagar Crater is located in farmland just next to the centre of the village of Ovillers-La-Boisselle along route D929, just north east of the town of Albert. It is approx 21 miles north east of Amiens along route D929.
Location of Surtsey. Map courtesy of U.S. Geological Survey. Location of the vents associated with the eruption of Surtsey. Surtla, Syrtlingur, and Jolnir are satellite vents that were active early in the eruption. Syrtlingur and Jolnir formed islands that were eroded away. Surtla grew close to but never above sea level (Kokelaar and Durant, 1983). From Moore (1985). Surtsey is a volcanic island and part of the Vestmannaeyjar submarine volcanic system. Vestmannaeyjar also produced the famous eruption of Heimaey (Eldfell). Surtsey is about 1.5 km in diameter and has an area of 2.8 square km. Surtsey is 33 km south of the main island of Iceland and 20 km southwest of Heimaey. The island is named for Surtur, a giant of fire in Icelandic mythology.