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Observation network


Earthquake Rapid Reporting System

 
Earthquake Rapid Reporting System1

By the earthquake disaster mitigation point of view, earthquake early warning and rapid report is a major method to greatly reduce earthquake losses. The functions of Earthquake Rapid Reporting System are: provide earthquake information within1 to tens of minutes after the occurrence of earthquake to speed up disaster response. The functions of the earthquake early warning system are: provide warnings within a few seconds or tens of seconds before the hit of the devastating earthquake waves after the occurrence of earthquake. Such warnings can be directly applied in the rescue of lives and properties. Such information plays a considerable important role in metropolitan earthquake disaster prevention and relief. In recent years, CWB has been installing real time earthquake observation network for tremor monitoring. To bring such observation network to fullest play, an earthquake rapid reporting system is established on the basis of such observation network and related research has been carried out. a strong earthquake early warning system Related research.

 

 

Earthquake information Time after the earthquake occurs (minute) Reaction
Warning 0 Immediate life rescue
Rapid reporting – 1 Initial information on the earthquake 1 Initial information on the location and scale of the earthquake, and management of survival and communication channels.
  2  
Rapid reporting – 2 Detailed information on the earthquake 3 Provide the information of the earthquake to the public, distribution of the rescue equipment, and evaluation of the disaster level of the country hit by the earthquake
  4  
Rapid reporting – 3 Basic estimation of the disaster 5 Estimation of the disaster, level of mobilization, assembly of the investigation team, assign the rescue areas
Rapid reporting – 4 Update of the disaster information 10-30 Immediate response of the medical teams, estimation of the loss, search for survivors, medical care and living supplies to the victims, establishing rescue centers
 
Earthquake Rapid Reporting System2

The earthquake rapid reporting system includes an efficient earthquake automatic positioning system that is able to determine information such as parameters of the epicenter of the earthquake and scale at certain level of accuracy. Meanwhile, in order to bring out the best performance of the system, channels to disseminate the earthquake information including E-Mail, WWW, Phone, Group FAX, Mobil Phone SMS and Public are integrated to make the system fully automatic from receiving the signal to releasing the information. Therefore, earthquake early warning can be gradually realized with the progress of hardware and software.

The earthquake rapid reporting system adopts two parallel operating systems in terms of signal processing: one is in the pattern of continuous recording, in which tremor signals are recorded in one file every minute for reading and judgment by computer programs. If the trigger conditions are satisfied, the operating staff will then process the signal. The other operating system takes the pattern of trigger recording and is fully automatic. When the local tremor signals meet the trigger standards, the system will record them into file for reading and judgment of another personal computer. If an earthquake is ensured, positioning work will be carried out and print in text and graph information regarding the earthquake epicenter, location, scale, and degree. Meanwhile, such data will be transmitted to the communications system and released on Internet. The application of local small scale observation network can effectively shorten the earthquake response time. Thus, the future development of the earthquake rapid reporting observation network will take a couple of small scale local networks to work with the present general major observation network. Via the network, use a computer as the administrator to monitor such major and minor observation networks. When the earthquake hits, the observation network administrator will select the best alternative to release the information as soon as possible. For example, the local minor network in Hualien will first calculate the result when Hualien is hit by an earthquake. If such an earthquake occurs in the area monitored by the local observation network, the results shall be well controlled. The observation network administrator can immediately release such results. If such an earthquake occurs offshore in the ocean, the minor local observation network may not get relatively good results due to too big blindness angles of observation stations. Thus, the results of the general observation network shall be released as it covers relatively bigger area with relatively smaller angles of blindness, resulting in better positioning.

Earthquake Rapid Reporting System3

Overall monitoring network

Administrator of the observation network

The main role of the observation network administrator is to control the quality of the released information. As far as the observation of earthquake scale, it is impossible to fully observe within 30 seconds of the earthquake as the shear force waves have not been transmitted to all observation stations. Thus, the preferred release method is in two phases. First, about 30 seconds after the occurrence of the earthquake, release the epicenter parameters (local minor network); then release the information regarding earthquake scale 1 minute afterwards and renew the epicenter parameters for better ones (general major network).

Take the earthquake in Hualien region for an example, it takes 30 seconds for the shear force wave to travel to Taipei. The Hualien local network can determine the epicenter parameters within 20 seconds after the occurrence of the earthquake, which means at least 10 seconds of early warnings to Taipei region. Such period of time can be effectively used for emergent disaster mitigation measures.