Terror alert systems are standardised emergency population warning systems for describing and disseminating information about terrorism-related threats. They became more popular after the September 11 attacks on the United States in 2001.
National Counter-Terrorism Alert Level
Administered by the Federal Attorney-General's Department.
Plan Vigipirate
International Terror Threat Level
Administered by the Garda Síochána. [1]
Since November 2015, the international terrorism threat level is considered to be at moderate, meaning an attack is "possible but not likely". [2] [3]
Administered by the Joint Terrorist Analysis Centre
Homeland Security Advisory System
Administered by the Department of Homeland Security
National Terrorism Advisory System
Bioterrorism is terrorism involving the intentional release or dissemination of biological agents. These agents include bacteria, viruses, insects, fungi, and/or toxins, and may be in a naturally occurring or a human-modified form, in much the same way as in biological warfare. Further, modern agribusiness is vulnerable to anti-agricultural attacks by terrorists, and such attacks can seriously damage economy as well as consumer confidence. The latter destructive activity is called agrobioterrorism and is a subtype of agro-terrorism.
Counterterrorism, also known as anti-terrorism, relates to the practices, military tactics, techniques, and strategies that governments, law enforcement, businesses, and intelligence agencies use to combat or eliminate terrorism.
In the United States, the Homeland Security Advisory System (HSAS) was a color-coded terrorism threat advisory scale created in March 2002 under the Bush Administration in response to the September 11 attacks. The different levels triggered specific actions by federal agencies and state and local governments, and they affected the level of security at some airports and other public facilities. It was often called the "terror alert level" by the U.S. media. The system was replaced on April 27, 2011, with a new system called the National Terrorism Advisory System.
The Storm Prediction Center (SPC) is a US government agency that is part of the National Centers for Environmental Prediction (NCEP), operating under the control of the National Weather Service (NWS), which in turn is part of the National Oceanic and Atmospheric Administration (NOAA) of the United States Department of Commerce (DoC).
Cyberterrorism is the use of the Internet to conduct violent acts that result in, or threaten, the loss of life or significant bodily harm, in order to achieve political or ideological gains through threat or intimidation. Acts of deliberate, large-scale disruption of computer networks, especially of personal computers attached to the Internet by means of tools such as computer viruses, computer worms, phishing, malicious software, hardware methods, programming scripts can all be forms of internet terrorism. Cyberterrorism is a controversial term. Some authors opt for a very narrow definition, relating to deployment by known terrorist organizations of disruption attacks against information systems for the primary purpose of creating alarm, panic, or physical disruption. Other authors prefer a broader definition, which includes cybercrime. Participating in a cyberattack affects the terror threat perception, even if it isn't done with a violent approach. By some definitions, it might be difficult to distinguish which instances of online activities are cyberterrorism or cybercrime.
Terrorism and mass attacks in Canada includes acts of terrorism, as well as mass shootings, vehicle-ramming attacks, mass stabbings, and other such acts committed in Canada that people may associate with terroristic tactics but have not been classified as terrorism by the Canadian legal system.
This article describes severe weather terminology used by the National Weather Service (NWS) in the United States. The NWS, a government agency operating as an arm of the National Oceanic and Atmospheric Administration (NOAA) branch of the United States Department of Commerce (DoC), defines precise meanings for nearly all of its weather terms.
The Joint Terrorism Analysis Centre (JTAC) is an all-source intelligence organisation closely related to the United Kingdom Security Service which provides advice to the British government and firms within the Critical National Infrastructure on terrorist threats.
Sociology of terrorism is a field of sociology that seeks to understand terrorism as a social phenomenon. The field defines terrorism, studies why it occurs and evaluates its impacts on society. The sociology of terrorism draws from the fields of political science, history, economics and psychology. The sociology of terrorism differs from critical terrorism studies, emphasizing the social conditions that enable terrorism. It also studies how individuals as well as states respond to such events.
MARSEC is the three-tiered United States Coast Guard Maritime Security system designed to easily communicate to the Coast Guard and the maritime industry pre-planned scalable responses for credible threats. Its objective is to provide an assessment of possible terrorist activity within the maritime sectors of transportation, including threats to nautical facilities and vessels falling within the jurisdiction of the United States that could be targets of attack.
On 29 June 2007, two car bombs in London were discovered and disabled before they could be detonated. The first device was left near the Tiger Tiger nightclub in Haymarket at around 01:30, and the second was left in Cockspur Street, located in close proximity to the nightclub.
On 29–30 June 2007, two related terrorist incidents occurred in the United Kingdom. In the second incident, one of the two perpetrators was killed, while five civilians were injured, none of them seriously.
The United Kingdom Terror Threat Levels, often referred to as UK Threat Levels, are the alert states that have been in use since 1 August 2006 by the British government to warn of forms of terrorist activity. In September 2010 the threat levels for Northern Ireland-related terrorism were also made available. In July 2019 changes were made to the terrorism threat level system, to reflect the threat posed by all forms of terrorism, irrespective of ideology. There is now a single national threat level describing the threat to the UK, which includes Islamist, Northern Ireland, left-wing and right-wing terrorism. Before 2006, a colour-based alert scheme known as BIKINI state was used. The response indicates how government departments and agencies and their staffs should react to each threat level.
Terrorism in the United Kingdom, according to the Home Office, poses a significant threat to the state. There have been various causes of terrorism in the UK. Before the 2000s, most attacks were linked to the Northern Ireland conflict. In the late 20th century there were also attacks by Islamic terrorist groups. Since 1970, there have been at least 3,395 terrorist-related deaths in the UK, the highest in western Europe. The vast majority of the deaths were linked to the Northern Ireland conflict and happened in Northern Ireland. In mainland Great Britain, there were 430 terrorist-related deaths between 1971 and 2001. Of these, 125 deaths were linked to the Northern Ireland conflict, and 305 deaths were linked to other causes, including 270 in the Lockerbie bombing. Since 2001, there have been almost 100 terrorist-related deaths in Great Britain.
CONTEST is the United Kingdom's counter-terrorism strategy, first developed by Sir David Omand and the Home Office in early 2003 as the immediate response to 9/11, and a revised version was made public in 2006. Further revisions were published on 24 March 2009, 11 July 2011 and June 2018. An Annual Report on the implementation of CONTEST was released in March 2010 and in April 2014. The aim of the strategy is "to reduce the risk to the UK and its interests overseas from terrorism so that people can go about their lives freely and with confidence." The success of this strategy is not linked to total elimination of the terrorist threat, but to reducing the threat sufficiently to allow the citizens a normal life free from fear.
The 2006 transatlantic aircraft plot was a terrorist plot to detonate liquid explosives, carried aboard airliners travelling from the United Kingdom to the United States and Canada, disguised as soft drinks. The plot was discovered by British Metropolitan police during an extensive surveillance operation. As a result of the plot, unprecedented security measures were initially implemented at airports. The measures were gradually relaxed during the following weeks, but passengers are still not allowed to carry liquid containers larger than 100 ml onto commercial aircraft in their hand luggage in the UK and most other countries, as of 2023.
The National Terrorism Advisory System (NTAS) is a terrorism threat advisory scale used by the US Department of Homeland Security since April 26, 2011.
The National Security Committee (NSC) of Ireland is a secretive inter-departmental committee responsible for ensuring that the Taoiseach and Government of Ireland are kept informed of high-level national security, intelligence and defence issues, and the state's response to them.
On 24 July 2014, a suspected imminent terror attack by Islamic extremists targeting Norway was disclosed by Norwegian authorities. The suspected plot prompted a public terror alert announcement and unprecedented short-term security measures being introduced in Norway in late July.
Terrorism in Switzerland has occurred periodically since the 1970s. Switzerland has experienced both domestic and international terrorism over the past several decades, though domestic terrorism was primarily low‐level violence.
 | This government-related article is a stub. You can help Wikipedia by expanding it. |