SOS-LIFE Earthquake early warning system. Quake
Alarm. Earth Quake detector.
The main characteristics of the SOS-LIFE
earthquake early warning and detection system:
- Digital equipment, independent from any other source, equipped with an
alarm, in case a major earthquake occurs.
- Has the possibility to manually activate a switch for sending of
International SOS distress signals (an acoustic SOS signal), if the
user is under ruins of a crashed building due to a major earthquake.
- For extreme situations, the earthquake early warning device is
equipped with rechargeable batteries.
- Testing function.
- Different colored lights, indicating the following statuses:
"Earthquake Alarm" , "OK Status" and "Low Battery " .
- Very powerful (Loud) imminent earthquake warning alarm (85 dB).
- The SOS-LIFE earth quake early warning system is equipped with a
string, making the device's transportation accessible upon a person, in
case of a major earth quake.
Earthquake stages and the principles of an
earthquake warning and detection :
- An earth quake has the following structure:
P Wave - Comes first at the destination
surface point, being harmless.
S Wave - Comes second, and it's
destructive upon buildings.
R Wave - Comes third,
being as destructive as the second.
- The quake alarm continously monitors the surrounding environment, in
search of an earthquake's initial P waves.
- When the quake alarm has detected a P wave ( representing the warning
of a future imminient major earthquake), the visual and acoustic quake
alarm will start.
- The SOS-LIFE earth quake early warning device, alarms you 30-60
seconds before an earthquake occurs, depending on the seismic
epicenter, hipocenter depth and the distance at which you are situated
from the seismic epicenter, earth composition etc.
|Technical specifications for the SOS-LIFE
earthquake early warning device:
- Display: angle of view : 60° ; intensity : 2500 mcd
- Alarm : 85 dB at a distance of 1 m.
- Dimensions: width: 8,5 cm. ; length: 4 cm. ; depth: 14,5 cm.
- Weight: 220 gr.
- Material: ABS (plastic material, with high durability and prolonged
- Power usage: 120 mA max.
- Battery Life : in case of emergencies, the batteries last 7 days,
since the quake has occured.
- Battery type: NiMH ; 4,8V DC ; 950 mAh
Accreditation and quality assessment:
- The devices manufactured by SOS-LIFE N.V., have
been thoroughly tested, in extreme conditions (picture), by the National
Center for Research on Earthquake Engineering (NCREE), being
properly configured, to sound the alarm when an earthquake of a minimum
5,3° Richter scale , happens.
configuration of the SOS-LIFE Quake alarm:
SOS-LIFE earthquake early warning devices, come preconfigured
especially for different area's earthquake topology. Customers have the
possibility to order the earthquake alarms, with their desired
sensitivity of the detection level, depending on the building seismic
risk, where the device will be installed. This configuration can be
made only at the SOS-LIFE manufacturer factory, being made on a
professional earthquake evaluation scale, equivalent and reported to
the correspondent level of magnitude on the Richter scale.
An earthquake can be devastating, if the proper anti-seismic measures
and precautions are not undertaken.
Ex. If the building is new, and it has an anti-seismic strong
structure, you could install a device configured to detect an
earthquake with a greater magnitude than 6,0 - 6,5 degrees on
Richter scale. The installation of the optimum configured
earthquake early warning device, avoids futile emotions, if an
earthquake occurs, that can not affect the structure of the building
you are in.
Initiation in primary
seismology and the SOS-LIFE Earthquake Alarm working principle
Earthquakes and seismic activity have always been a hot issue.
Attention is stimulated time and again by disasters such as the
earthquakes in Turkey, Taiwan, and Iran. It has become apparent that
the power of an earthquake is not something we are currently prepared
to handle. Much of the problem is that the damaging earthquake waves
seem to come out of nowhere without warning. However, this is not truly
Earthquakes, if analyzed properly, can actually give warning of their
incipient occurrence, even before the ground starts shaking heavily. A
critical objective is to quickly identify the precursors of the
destructive waves of the earthquake in time to initiate an alarm.
SOS-LIFE is a unique digital earthquake early warning alarm that can
quickly and reliably identify the precursors that precede every
earthquake. The unit continuously monitors your surrounding for these
precursors. When it detects a precursor, expected to be followed up by
a major earthquake, the unit will alarm instantly. SOS-LIFE uses a
combination of the latest sensing hardware and specially developed -
state of the art – software.
Although the exact warning time varies for every earthquake as this is
depending on several variables, so as the distance from the epicenter,
soil conditions, depth of the earthquake etc, warning time can reach up
to 60 seconds. This might not seem like a long time, but in just
seconds occupants could wake up their children and find a safe
location, away from sharp and heavy objects that could injure them!
SOS-LIFE can be compared with a smoke detector: The unit senses danger
which already occurred, but the warning time might still be enough to
reach a safe location.
SOS-LIFE is especially designed for use in single private households
and small offices. The unit can be attached to the wall (in the office,
bedroom or staircase) and it will give a loud acoustic (85 dB) and
visual (red blinking LED’s) alarm.
SOS-LIFE is a scientifically tested and approved system.
Working principle of SOS-LIFE
When an earthquake occurs, energy radiates outward in all directions.
The energy travels through and around the earth as three types of
seismic waves called primary, secondary, and surface waves (P-wave,
S-wave and Surface-waves). All various types of earthquakes follow this
pattern. At a given distance from the epicenter, first the P-wave
arrives, then the S-wave, both of which have such small energies that
they are mostly not threatening. Finally, the surface waves arrive with
all of their damaging energies (Figure 3). It is predominantly the
surface waves that we would notice as the earthquake. This knowledge,
that preceding any destructive earthquake there are telltale P-waves,
are used by SOS-LIFE to reliably initiate an alarm before the arrival
of the destructive waves.
The fastest kind of seismic wave is the P-wave and always arrives
firstly at your house. P-waves typically travel 1.68 times faster than
S-waves and 2 to 3 times faster than the Surface-waves, which typically
travel at about 3.7 km/s. Thus there is typically a one-second
separation between the P- and S-waves for every 8 km traveled. S-waves
travel about 4 km/s faster than surface waves, so every 4 km away from
the epicenter typically adds one extra second of delay between the P-S
complex and the arrival of the Surface-waves.
Figure 1, shows the passage of P-waves through the earth:
The P-wave can move through solid rock and fluids, like water or the
liquid layers of the earth. It pushes and pulls the rock and moves
through just like sound waves push and pull the air. Have you ever
heard a big clap of thunder and heard the windows rattle at the same
time? The windows rattle because the sound waves push and pull on the
window glass, much like P-waves push and pull on rock. Although
potentially part of a large earthquake, usually we do not feel much of
these waves and they are not dangerous.
After an earthquake many times people have reported that their animals
behaved unusually just before the earthquake stroke. They believe their
animals were able to predict the earthquake. In fact, some animals can
sense the harmless P-waves and express the coming danger with unusual
SOS-LIFE uses rapidly responding sensors and digital signal processors
in combination with reliable “P-wave recognition software”, based on
real earthquake data from various earthquakes, to identify the P-wave
and immediately initiate an alarm. The SOS-LIFE unit will only alarm
when a major earthquake threatens to occur. The unit will not respond
to normal trembling, caused by heavy trucks, slamming doors, playing
children etc. The SOS-LIFE system is extensively tested by independent
earthquake research institutes worldwide.
Secondary waves (also referred to as shear waves)
can travel through solids, but unlike P-waves they cannot travel
through liquids. The energy of an S-wave travels through the earth as a
sequence of up-and-down vibrations perpendicular to the surface of the
earth. Its passage causes particles to vibrate in all directions,
North-South and East-West. Its velocity is between that of P-waves and
that of Surface-waves.
Figure 2, shows the passage of S-waves through the earth:
Surface waves are the slowest and by far the most
destructive of the three types of seismic waves. Surface waves travel
along the surface of the earth as two types of waves: Love waves are
the fastest surface waves and move the ground from side-to-side, while
Rayleigh waves (R-waves) roll along the ground just like a wave rolls
across a lake or an ocean. Because it rolls, it moves the ground up and
down, and side-to-side in the same direction that the wave is moving.
Most of the shaking felt from an earthquake is due to the R-wave, which
can be much larger than the other waves.
Figure 3, shows the passage of both the Love and Rayleigh waves through
Detection and verification process of the SOS-LIFE
The approach of SOS-LIFE is shown in the flow
The motion of seismic movements exposed to the unit are measured
promptly, and accurately by a high sensitivity and fast-responding
built-in accelerometer. The out coming data produced by the
accelerometer is processed continuously and filtered in order to remove
noise. While continuously monitoring the accelerometer out coming data,
an unusually large acceleration disturbance is identified, and labelled
as a possible P-wave. The system’s P-wave recognition algorithms
instantly calculate whether a potentially life threatening earthquake
can be expected to follow up. If the movement pattern does not
correspond with an earthquake pattern, the system shrugs it off as a
false alarm. It is because of the accuracy of the P-wave recognition
algorithms that the detection system can filter out extraneous noise,
such as might be produced by large trucks, rock blasting, slamming
doors etc. If, on the other hand, an earthquake pattern does show up,
the detection system immediately actuates the alarm. The alarm could be
issued within less than a few milliseconds after the presence of a
P-wave is verified. All channels of the accelerometer are processed
separately and during the calculation process of the first identified
large acceleration disturbance, a second processing unit is already
waiting to identify a following seismic movement.
|SOS-LIFE Quake alarm certificates and documents
Moreover you can see the Personal Safety Pod , our new S.U.P.E.R SHELTER (
Safe-Use Personal Emergency Rescue Shelter ), wich, after the warning
device signal, will protect your life in case of earthquakes , tornados
, hurricanes , terrorist attacks , war actions .