Does it really work? How many seconds it will go off before the Earthquake comes?
1802760
You usually have a second for every 6 to 9 kilometers depending on the distance to the epicenter plus depth. So if you are very close to a suspected fault, you will have no time.
1802761
Earthquakes start with a slight movement that human beings do not feel until it becomes acute. The detector records the slightest movement could be 10 seconds before the stronger.
1802762
I can not answer yet. After installation i hVe not been home to witness performance evel. It is a pendulem that contacts an adjustable v shaped contact so I am sure it will work as described. The unique a.arm sound shuld verify an earthquake. If i were sleeping that may give my famly more time to get to safer places. We are in orange county area.
1802763
it works great. the number of seconds depends on your distance to the epicenter. google search about P-Wave propagation and speed.
1802764
and I can answer your question if far not an earthquake has occurred. however, the alarm sounds, if it works because I tried it.
1815264
Yes I have. Rate 1-10 I give it a 9-10. Works great. I strongly recommend this one. Anytime I hear them I set it out, sometimes it may take up to an hour, but it will do the job. I sit it out about 60 yards away & wait. Just turn it up loud & hammer down. If you'r looking for one, this is it!! Good luck.
1944499
The minute the person gets up or attempts to turn over this alarm goes off. If you raise any part of your body that is resting on this it will go off. It is sensitive. I hope that answers your question.
1348866
Yes, the alarm will stop sounding after 45 seconds. It will be activated again if it experiences further motion.
551955
It goes off for about 30 seconds at a time. If it gets bumped or not continually sensing movement it resets itself. If its getting moved or constantly sensing movement it will continually sound off, and by the way it is LOUD!
1386163
It usually worked pretty quickly for me; I think within a few seconds to under one minute. This can vary based on the satellite info it is receiving, so you really can't count on it being a certain amount of time each and every time.
466292
I've never timed it but it's under 5 minutes. I live at sea level which makes a difference, too.
1300860
The short answer: I believe it can!! It certainly won't hurt.......The long answer: I live in Santo Domingo, in the Dom. Rep. on the 5th floor and after the big quake that hit Haiti in 2010, my husband and I decided to buy the 2 types of earthquake alarms that amazon offers. It certainly eases our minds and they do work!! We get several littler quakes from time to time and depending how big they are, where they are located, will effect if they go off or not! I would also read up on earthquakes (if you haven't already) and how they work, etc., regarding the P and S waves, but the earthquake alarm receives the vibrations from the one wave (which is the one that some animals can detect before the actual quaking starts) and is the one that the alarm(s) respond to when it's big enough!! We have ours hanging in our walk-in closet (where it's not disturbed) in our bedroom in case it happens during the early morning hours while we're sleeping and every couple of months, we check it to make sure it's functioning! It's releases a high pitch tone (not as annoying as a smoke detector) but you'll learn to recondition yourself to the sound and recognize it soon enough! It may go off even if you don't feel the shaking, but that's rare! In my mind, just that split second or two can make a world of difference!! I would definitely recommend this product to anyone that lives in an earthquake prone area!! Good Luck and I hope this helped :)
2015086
Yes, indeed it will work for about 6-8 hours. We can change the frequency from 1 minute to 3 minutes which should resolve your issue.
96880
It would work for that. When the one minute alarm goes off, you would hit the button once to stop the alarm. Then hit it again and it would start another minute automatically.
1270828
No way! It only works 50% of the time. I would definitely not trusted before breaking up concrete.
1499054
Yes, they advertise it as going off once there is no movement in it's surround area after 60 (sixty) seconds. It proved to me to be so, until about three weeks later, it wouldn't go off at all; it would blink after sixty seconds, but would stay on.
603877
If it is moved or gets jarred it will make a loud "chirp" as a warning. I haven't had any false alarms with it. I believe if the alarm is triggered that it goes off in like 15 seconds unless the code is entered before that.
69967
after a second or two yes. I recommend this to lots of my clients! If you have movement inside your home it will go off. If you have motion in that space I would not buy this.
1300862
The alarm would inform you of any local earthquake activity. However the alarm is only useful if your have a plan of what to do when it goes off. I suggest you have a plan of what to do for a very mild quake, a moderate to severe quake (That will probably cause property damage), and a very severe quake. If you are really concerned, you should practice, with your family, so that you will all react automatically. Best wishes.
1034856
Sorry for the looooooooooong delay in answering - It repeats for a about 1 minute. Hope you bought it - It works GREAT and the four timing options are very useful.
1270827
No way! It works 50% of the time. I would definitely NOT trust it before breaking up concrete.