List of mass shootings in the United States information
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Deadliest mass shootings in the United States since 1949 (with 10 or more fatalities excluding perpetrators)
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Most notable mass shootings in the contiguous United States
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Mass shootings in Alaska
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Mass shootings in Hawaii
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Mass shootings in Puerto Rico
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Mass shootings in the United States Virgin Islands
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Mass shootings in the Northern Mariana Islands
This is a list of the most notable mass shootings in the United States that have occurred since 1900. Mass shootings are incidents involving several victims of firearm-related violence. The precise inclusion criteria are disputed, and there is no broadly accepted definition.[1][2]Only shootings that have Wikipedia articles of their own are included in this list. Detailed lists of mass shootings can be found per year at their respective pages.
The Gun Violence Archive, a nonprofit research group that tracks shootings and their characteristics in the United States, defines a mass shooting as an incident in which four or more people, excluding the perpetrator(s), are shot in one location at roughly the same time,[3] with the FBI having a minimum of three. The Congressional Research Service narrows that definition further, only considering what it defines as "public mass shootings", and only considering victims as those who are killed, excluding any victims who survive.[2]The Washington Post and Mother Jones use similar definitions, with the latter acknowledging that their definition "is a conservative measure of the problem", as many rampages with fewer fatalities occur.[4][5] The crowdsourced Mass Shooting Tracker project uses a looser definition than the Gun Violence Archive's definition: four people shot in one incident regardless of the circumstances.[6]
Larger documentation of mass shootings in the United States has occurred through independent and scholarly studies such as the Stanford University Mass Shootings in America Data Project.[4][7]
^Borchers, Callum (October 4, 2017). "The vague definition of 'mass shooting' complicates media coverage". The Washington Post. Archived from the original on October 21, 2020. Retrieved August 26, 2018. ...'mass shooting' is a term without a universally-accepted definition.
^ abBjelopera, Jerome (March 18, 2013). "Public Mass Shootings in the United States" (PDF). Congressional Research Service. Archived from the original (PDF) on September 9, 2013. Retrieved August 26, 2018. There is no broadly agreed-to, specific conceptualization of this issue, so this report uses its own definition for public mass shootings.
^"General Methodology". Gun Violence Archive. Retrieved August 27, 2018.
^ abBerkowitz, Bonnie; Lu, Denise; Alcantara, Chris (September 14, 2018). "More than 50 years of U.S. mass shootings: The victims, sites, killers and weapons". The Washington Post. Archived from the original on December 1, 2021. Retrieved August 27, 2018.
^Follman, Mark; Aronsen, Gavin; Pan, Deanna (September 20, 2018). "A Guide to Mass Shootings in America". Mother Jones. Archived from the original on May 28, 2019. Retrieved August 26, 2018.
^"About the Mass Shooting Tracker". Mass Shooting Tracker. Archived from the original on April 6, 2020. Retrieved April 6, 2020.
^Cite error: The named reference :0 was invoked but never defined (see the help page).
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