The information provided on this e-mail service does not come from UNESCO. UNESCO transmits this information on an unofficial basis. Official alerts are sent by government authorities via Tsunami Monitoring Focal Points (TWFPs) and designated national authorities. UNESCO does not assume any warranties, guarantees or guarantees as to the timeliness, timeliness, accuracy, precision, reliability or other aspects of the properties or use of the information available through this e-mail service. A few days after the 2010 willow earthquake, IPOC`s long tiltmeters (LBTs) and STS2 seismometer recorded a number of long-term signals. The same effect was recorded by broadband seismometers in India and Japan a few days after the 2004 Indian Ocean earthquake and tsunami. Simulations carried out in 2013 on historical data showed that „tiltmeters and broadband seismometers are therefore valuable instruments for monitoring tsunamis in addition to tide level tables.“ In the case of the 2010 willow earthquake, tilt sensors observed a separate signal „that begins 20 minutes before the tsunami`s arrival time at the nearest point to the coast.“ [5] Madagascar has signed a tsunami warning agreement with the Comprehensive Nuclear Test-Ban Treaty Organization (CTBTO) that strengthens the country`s ability to issue faster and more accurate tsunami security alerts. Since March 2005, CTBTO has been providing real-time and reliable data on a test basis to tsunami warning centers around the world. The data comes from a hundred IMS stations located in areas at high risk of tsunami. The abundance of verification data has a large number of important civil and scientific applications that, in addition to the CTBT`s verification objective, could contribute to sustainable development and human well-being. Regional (or local) warning systems centres use seismic data on nearby earthquakes to determine if there is a potential local threat from a tsunami. These systems are able to issue warnings to the general public (through sound systems and sirens) in less than 15 minutes. Although the epicenter and intensity of the moments of an underwater earthquake and the likely arrival times of the tsunami can be calculated quickly, it is almost always impossible to know if there have been any underwater ground changes that will cause tsunami waves.

As a result, these systems may have false alarms, but the disruption is low, which is useful due to the highly localized nature of these extremely early warnings, combined with the difficulty of a false alarm to affect more than a small part of the system. Real tsunamis would affect more than a small part. [Citation required] The International Coordination Group (ICG/ITSU) was established as a subsidiary body of the IOC, which meets every two years in a Member State, to coordinate and monitor the activities of the International Tsunami Warning System (ITWS). Since 1965 and with the support of the IOC, the tsunami warning system, integrated into other regional tsunami warning systems, has become the core of a truly international network. Twenty-three nations are now members of the ICG/ITSU. Several third countries and territories maintain stations. The system uses approximately 31 seismic stations, 53 tidal stations and 101 broadcast points spread across the Pacific, under different control from ITSU Member States. The system became active at the end of June 2006, under the leadership of UNESCO. It consists of 25 seismographic stations that transmit information to 26 national tsunami information centres, as well as six Deep-Ocean Assessment and Reporting of Tsunami (DART) buoys. [1] However, UNESCO warned that it was necessary to strengthen coordination between governments and methods of transmitting information from the centres to vulnerable civilians in order to make the system effective.

[2] Residents of some areas would have had more than enough time to take shelter if they had been aware of the impending disaster.. . . .

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