Area warning system for earthquakes and other natural disasters

• US 5,910,763 A
• Filed: 02/18/1997
• Issued: 06/08/1999
• Est. Priority Date: 02/18/1997
• Status: Expired due to Term

• Current Assignee: Disaster Warning Network, Inc.
• Original Assignee: Itai Leshniak
• Inventors: Flanagan, John
• Primary Examiner(s): Hofsass, Jeffery A.
• Assistant Examiner(s): TWEEL JR, JOHN ALEXANDER
• Application Number:
  US08/802,448
• Time in Patent Office: 840 Days
• Field of Search: 340/286.2, 340/690, 340/540, 324/323, 324/344, 324/345, 364/421, 73/654
• US Class Current: 340/286.02
• CPC Class Codes: G08B 21/10 responsive to calamitous events, e.g. tornados or earthquakes

Abstract

A system that provides an area warning to a specific general population of an earthquake prior to the arrival of the hazardous ground motion typically associated with earthquakes, and of approaching natural disasters that could impact an area. This area advanced warning thereby provides time for users to seek shelter and through automated means to reduce property damage as well as injuries and lives lost. A preferred embodiment of the invention described herein utilizes a plurality of Local Station Detector Sites, equipped with earthquake seismic motion detectors and microprocessors designed to almost instantaneously provide a profile of existing ground motion to a Central Processing Site in conjunction with further analysis of similar signals from multiple sites. A warning instruction is then transmitted back to all appropriate Local Station Detector Sites to initiate transmission of local area warnings to a general population of all users in an appropriate and specific geographic area with minimal possibility of false alarms. Additionally all Local Station Detector Sites are equipped to receive notification transmissions from the Central Processing Site, which have been initiated by Public Safety Offices for other natural disasters, and transmit appropriate warning signals to the general population of users in specific geographic areas.

Claims

1. A wide area earthquake detection and general population advanced early warning system comprising:

a plurality of local station detector sites distributed as an array over a wide geographic area, each such site having;

a ground motion sensor having means for detecting earthquake generated "P" waves and subsequently received earthquake generated "S" waves;

an analyzer having means for determining the relative magnitude, intensity, and location, of an earthquake based upon receipt of said "P" waves and said "S" waves;

a transmitter having means for transmitting a signal indicative of said analyzer determined magnitude, intensity, and location to a central processing site;

a receiver having means for receiving signals from a central processing site; and

a transmitter having means for transmitting advanced early warning signals to the entire local surrounding general population around each local station detector site of said earthquake;

a central processing site located at a selected position distinct from said array of local detection sites and having;

a receiver having means for receiving said signals from said array of local station detection devices;

a computer having means for calculating and analyzing the magnitude, intensity, location, and direction of travel, of said earthquake based upon said signals; and

a transmitter having means for transmitting warning signals of said earthquake to selected local station detection sites;

whereby each appropriate selected local station detector site as determined by the central processing site, will transmit advanced early warning signals specifically to those entire local surrounding general populations in a specific and targeted geographic area that are in imminent danger from an earthquake in progress.

2. The wide area earthquake detection and general population advanced early warning system recited in claim 1 further comprising a plurality of alarm devices having receivers dispersed among said entire general population and having means for receiving said warning signals for generating alarm responses among said entire general population to said earthquake.

3. The wide area earthquake detection and general population advanced early warning system recited in claim 2 further comprising a plurality of alarm devices having receivers dispersed among said entire general population wherein said alarm devices comprise a microprocessor controller having means for activating and deactivating selected electrical devices;

whereby said electrical devices that have been left in an off position, are activated and turned on to allow receipt of said warning signals from the local station detector sites for generating alarm responses among said entire general population to said earthquake.

4. The wide area earthquake detection and general population advanced early warning system recited in claim 1 wherein each of said local station detection sites comprises a receiver having means for receiving said warning signals from said central processing site;

and wherein each said local station detection site comprises a means for transmitting said warning signal to the entire local geographic area in proximity to each local station detection site;

whereby the entire population of the selected specific geographic areas will receive advanced warning signals of said earthquake in progress.

5. The wide area earthquake detection and general population advanced early warning system recited in claim 1 wherein each said local station detection device comprises means for responding to each movement that meets a predetermined threshold criteria.

6. A wide area natural disaster detection and general population advanced early warning system comprising:

a plurality of local station detector sites distributed as an array over a wide geographic area, each such site having;

a receiver having means for receiving alert warning signals indicative of natural disasters from a central processing site, and a transmitter having means for transmitting advanced early warning signals to the entire local surrounding general population around each local station detector site of said natural disaster;

a central processing site located at a selected position distinct from said array of local station detection sites and having;

a receiver having means for receiving warning alert signals indicative of said natural disasters from selected public safety offices or any other available detection sources,

a computer having means for calculating and analyzing the magnitude, intensity, location, and direction of travel, of said natural disasters based upon receipt of said warning alert signals, and

a transmitter having means for transmitting warning signals of said natural disasters to selected local station detection sites;

whereby each appropriate selected local station detector site as determined by the central processing site, will transmit advanced early warning signals specifically to those entire local surrounding general populations in a specific geographic area that is in imminent danger from a natural disaster.

7. The wide area natural disaster and general population advanced early warning system recited in claim 6 further comprising a plurality of alarm devices having receivers dispersed among said entire general population and having means for receiving said warning signals for generating alarm responses among said entire general population to said natural disasters.

8. The wide area natural disaster and general population advanced early warning system recited in claim 7 further comprising a plurality of alarm devices having receivers dispersed among said entire general population wherein said alarm devices comprise a microprocessor controller having means for activating and deactivating selected electrical devices;

whereby said electrical devices that have been left in an off position, are activated and turned on to allow receipt of said warning signals from the local station detector sites for generating alarm responses among said entire general population to said natural disasters.

9. The wide area natural disaster and general population advanced early warning system recited in claim 6 wherein each of said local station detector sites comprises a receiver having means for receiving warning alert information from said central processing site:

and wherein each said local station detector site comprises a means for transmitting said warning signal to the entire local geographic area in proximity to each local station detector site;

whereby the entire population of the selected specific geographic areas will receive advanced warning signals of said natural disasters in progress.