Title: Earthquake warning system
Content:  As of 2016, Japan and Taiwan have comprehensive, nationwide earthquake early warning systems. Other countries and regions have limited deployment of earthquake warning systems, including Mexico (the Mexican Seismic Alert System covers areas of central and southern Mexico including Mexico City and Oaxaca), limited regions of Romania (the Basarab bridge in Bucharest), and parts of the United States. The earliest automated earthquake pre-detection systems were installed in the 1990s; for instance, in California, the Calistoga fire station's system which automatically triggers a citywide siren to alert the entire area's residents of an earthquake. Some California fire departments use their warning systems to automatically open overhead doors of fire stations before the earthquake can disable them. While many of these efforts are governmental, several private companies also manufacture earthquake early warning systems to protect infrastructure such as elevators, gas lines and fire stations.
Title: Earthquake warning system
Content:   An earthquake warning system or earthquake early warning system is a system of accelerometers, seismometers, communication, computers, and alarms that is devised for notifying adjoining regions of a substantial earthquake while it is in progress. This is not the same as earthquake prediction, which is currently incapable of producing decisive event warnings.
Title: ShakeAlert
Content:   ShakeAlert is an earthquake early warning system (EEW) in the United States, developed and operated by the United States Geological Survey (USGS) and its partners. As of 2021, the system issues alerts for the country's West Coast (specifically the states of California, Oregon and Washington). It is expected that the system will be expanded to other seismically active areas of the United States in the future. Similar to other earthquake early warning systems, ShakeAlert does not predict earthquakes, but rather it attempts to quickly identify a seismic event and issue an alert before widespread shaking is felt. It does this by detecting an earthquake's fast moving (but weak) P waves, then computes the event's location and estimated magnitude, after which it issues the warning. Depending on a person's distance from the earthquake's epicenter, the alert may reach them before the earthquake's slower moving (but 
Title: Earthquake warning system
Content:  On August 11, 2020, Linux Foundation, IBM and Grillo announced the first fully open-source earthquake early-warning system, featuring instructions for a low-cost seismometer, cloud-hosted detection system, dashboard and mobile app. This project is supported by USAID, the Clinton Foundation and Arrow Electronics. Smartphone-based earthquake early-warning systems are dependent on a dense network of users near the earthquake rupture zone, whereas OpenEEW has focused instead on providing affordable devices that can be deployed in remote regions close to where earthquakes can begin. All components of this system are open source and available on the project's GitHub repositories.
Title: Earthquake Early Warning (Japan)
Content:  to minimize earthquake damage and enable people to take shelter or evacuate dangerous areas before the arrival of its strong surface waves. It is used by railways to slow trains and by factories to halt assembly lines before the earthquake hits. The effectiveness of the warning depends on the position of the receiver. After receiving a warning, a person has from a few seconds to a minute or more to take action. Areas near an epicenter may experience strong tremors before a warning is issued. After the 2011 Tōhoku earthquake and tsunami, the EEW system and Japan's tsunami warning system were considered effective. Although the tsunami killed over 10,000 people, it is believed that the casualties would have been much higher without the EEW system. In April 2011, the Chilean Subsecretary of Telecommunications said that their country hoped to establish a similar early-warning system.
Title: Earthquake warning system
Content:  Japan's Earthquake Early Warning system was put to practical use in 2006. The system that warns the general public was installed on October 1, 2007. It was modeled partly on the Urgent Earthquake Detection and Alarm System (UrEDAS) of Japan Railways, which was designed to enable automatic braking of bullet trains. Gravimetric data from the 2011 Tōhoku earthquake has been used to create a model for increased warning time compared to seismic models, as gravity fields travel at the speed of light, much faster than seismic waves.
Title: 2011 Tōhoku earthquake and tsunami
Content:  One minute before the earthquake was felt in Tokyo, the Earthquake Early Warning system, which includes more than 1,000 seismometers in Japan, sent out warnings of impending strong shaking to millions. It is believed that the early warning by the Japan Meteorological Agency (JMA) saved many lives. The warning for the general public was delivered about eight seconds after the first P wave was detected, or about 31 seconds after the earthquake occurred. However, the estimated intensities were smaller than the actual ones in some places, especially in Kanto, Koshinetsu, and Northern Tōhoku regions where the populace warning did not trigger. According to the Japan Meteorological Agency, reasons for the underestimation include a saturated magnitude scale when 
Title: 2013 Saravan earthquake
Content:  There is no method to accurately predict an earthquake, however, there are systems which attempt to give early warnings when earthquakes occur. Currently the most all-inclusive system is Japan's Earthquake Early Warning system. This system is monitored by the Japanese Meteorological Agency The JMA sends out the warnings through the television, mobile devices, the internet, and the radio as soon as an earthquake is detected. Other countries have similar systems that are mostly limited to a particular region, for example, the United States' early warning system is in place only for the earthquake disposed west coast. One study conducted in California, United States suggests there may be a new way to more precisely presage earthquakes. This group of scientists, composed of scientists from the Carnegie Institution for Science, Rice University, and the University of California, Berkeley monitored earthquake waves in the San Andreas Fault using seismometers for twenty years. This group discovered cracks in the fault filled with fluids. The scientists noticed that these fluids shifted after being disrupted by seismic activity. Shifting fluids cause faults to weaken, making them more prone to earthquakes.
Title: Earthquake Early Warning (Japan)
Content:  The JMA has two EEW systems: one for the general public and another for the National Meteorological and Hydrological Services. When a P-wave is detected from two (or more) of the 4,235 seismometers installed throughout Japan, the JMA analyzes and predicts the approximate location of the earthquake's epicenter. This allows the JMA to notify people in affected prefectures by TV and radio if a strong earthquake is expected. An Earthquake Early Warning is issued to warn the general public when an earthquake of 5 or higher on the Japan seismic scale is expected. An EEW forecast (緊急地震速報(予報)) is issued to the National Meteorological and Hydrological Services when an earthquake of 3 or higher on the Japan seismic scale (or 3.5 or higher on the Richter magnitude scale) is expected, or when the amplitude of P- or S-waves measures more than 100 gals. The system was 
Title: Earthquake warning system
Content:   The United States Geological Survey (USGS) began research and development of an early warning system for the West Coast of the United States in August 2006, and the system became demonstrable in August 2009. Following various developmental phases, version 2.0 went live during the fall of 2018, allowing the "sufficiently functional and tested" system to begin Phase 1 of alerting California, Oregon and Washington. Even though ShakeAlert could alert the public beginning September 28, 2018, the messages themselves could not be distributed until the various private and public distribution partners had completed mobile apps and made changes to various emergency alerting systems. The first publicly available alerting system was the ShakeAlertLA app, released on New Year's Eve 2018 (although it only alerted for shaking in the Los Angeles area). On October 17, 2019, Cal OES announced a statewide rollout of the alert distribution system in California, using mobile apps and the Wireless Emergency Alerts (WEA) system. California refers to their system as the California Earthquake Early Warning System. A statewide alert distribution system was rolled out in Oregon on March 11, 2021 and in Washington on May 4, 2021, completing the alert system for the West Coast.

Question: what is the name of the first earthquake early warning system?
Answer: 1991.
The Mexican Seismic Alert System.