Alternate Views: Get Data, FAQ, ISO Rubric, CSW, HTML, Components, XML Helena, USA Images Location: almost directly beneath Helena. Affected area: 363,000 square kilometers. Damage: $4 million. A series of earthquakes beginning on October 3, 1935, shook the area. The strongest of the shocks was on October 18. Several shocks of lesser intensity were followed by a second strong earthquake on October 31 that destroyed many buildings that had been previously damaged. The shocks continued with additional strong shocks on November 21 and November 28. Get the Data Access Format(s) Distributor(s) / Contact Info Instructions / Constraints download Event Description Natural hazard event (tsunami, earthquake, volcanic eruption or other geological hazard) description, image thumbnails, map, links to metadata and details from the NGDC Hazards databases search Natural Hazards Image Database Collection of damage and geological images resulting from natural hazards, specifically tsunamis, earthquakes, and volcanoes. download Keyhole Markup Language (KML) Event epicenter and image locations TIFF Format version: (version is unknown) JPEG Format version: (version is unknown) Hazards Data DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (303) 497-3707 7:30 - 5:00 Mountain Legal Constraints Access otherRestrictions Use Limitation otherRestrictions Other Please cite the original source when using these data. Access Constraints: None; Use Constraints: None; Disclaimer - While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.