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Index J-Alert

is a nationwide warning system in Japan launched in February 2007. [1]

29 relations: Ballistic missile, Cabinet Secretariat (Japan), Cell Broadcast, Citizenship, Earthquake Early Warning (Japan), Email, Emergency population warning, Guerrilla rainstorm, Guerrilla warfare, Hypocenter, ISDB, Japan, Japan Meteorological Agency, Japan Meteorological Agency seismic intensity scale, Loudspeaker, Mass media, Ministry of Internal Affairs and Communications, Moment magnitude scale, NHK, Radio broadcasting, Satellite, Special forces, Superbird-B2, Tōkai earthquakes, Terrestrial television, Urban area, YouTube, 1seg, 2011 Tōhoku earthquake and tsunami.

Ballistic missile

A ballistic missile follows a ballistic trajectory to deliver one or more warheads on a predetermined target.

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Cabinet Secretariat (Japan)

The is an agency in the Japanese government, headed by the Chief Cabinet Secretary.

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Cell Broadcast

Cell Broadcast/Cell Information (CB) messaging is a mobile technology feature defined by the ETSI’s GSM committee and is part of the 2G, 3G, 4G LTE (telecommunication) and 5G standards.

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Citizenship is the status of a person recognized under the custom or law as being a legal member of a sovereign state or belonging to a nation.

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Earthquake Early Warning (Japan)

The is a warning issued when an earthquake is detected in Japan.

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Electronic mail (email or e-mail) is a method of exchanging messages ("mail") between people using electronic devices.

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Emergency population warning

An emergency population warning is a method whereby local, regional, or national authorities can contact members of the public en masse to warn them of an impending emergency.

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Guerrilla rainstorm

A is a Japanese expression used to describe a short, localized downpour of over 100 mm of rain per hour caused by the unpredictable formation of cumulonimbus cloud.

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Guerrilla warfare

Guerrilla warfare is a form of irregular warfare in which a small group of combatants, such as paramilitary personnel, armed civilians, or irregulars, use military tactics including ambushes, sabotage, raids, petty warfare, hit-and-run tactics, and mobility to fight a larger and less-mobile traditional military.

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A hypocenter (or hypocentre) (from ὑπόκεντρον for 'below the center') is the point of origin of an earthquake or a subsurface nuclear explosion.

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The Integrated Services Digital Broadcasting (ISDB) (Japanese:, Tōgō dejitaru hōsō sābisu) is a Japanese standard for digital television (DTV) and digital radio used by the country's radio and television networks.

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Japan (日本; Nippon or Nihon; formally 日本国 or Nihon-koku, lit. "State of Japan") is a sovereign island country in East Asia.

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Japan Meteorological Agency

The, JMA, is an agency of the Ministry of Land, Infrastructure, Transport and Tourism.

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Japan Meteorological Agency seismic intensity scale

The Japan Meteorological Agency seismic intensity scale is a seismic scale used in Japan to measure the intensity of earthquakes.

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A loudspeaker (or loud-speaker or speaker) is an electroacoustic transducer; which converts an electrical audio signal into a corresponding sound.

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Mass media

The mass media is a diversified collection of media technologies that reach a large audience via mass communication.

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Ministry of Internal Affairs and Communications

The is a cabinet-level ministry in the Government of Japan.

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Moment magnitude scale

The moment magnitude scale (MMS; denoted as Mw or M) is one of many seismic magnitude scales used to measure the size of earthquakes.

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is Japan's national public broadcasting organization.

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Radio broadcasting

Radio broadcasting is transmission by radio waves intended to reach a wide audience.

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In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit.

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Special forces

Special forces and special operations forces are military units trained to conduct special operations.

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Superbird-B2, also known by its pre-launch designation Superbird-4, is a Japanese communications satellite which is operated by SKY Perfect JSAT Group.

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Tōkai earthquakes

The Tōkai earthquakes are major earthquakes that have occurred regularly with a return period of 100 to 150 years in the Tōkai region of Japan.

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Terrestrial television

Terrestrial or broadcast television is a type of television broadcasting in which the television signal is transmitted by radio waves from the terrestrial (Earth based) transmitter of a television station to a TV receiver having an antenna.

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Urban area

An urban area is a human settlement with high population density and infrastructure of built environment.

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YouTube is an American video-sharing website headquartered in San Bruno, California.

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is a mobile terrestrial digital audio/video and data broadcasting service in Japan, Argentina, Brazil, Chile, Uruguay, Peru and the Philippines.

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2011 Tōhoku earthquake and tsunami

The was a magnitude 9.0–9.1 (Mw) undersea megathrust earthquake off the coast of Japan that occurred at 14:46 JST (05:46 UTC) on Friday 11 March 2011, with the epicentre approximately east of the Oshika Peninsula of Tōhoku and the hypocenter at an underwater depth of approximately.

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[1] https://en.wikipedia.org/wiki/J-Alert

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