Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: How big does an earthquake generally need to be to set this thing off? We had a few earthquakes close to us but didn't even feel them.
Document: I live in Nicaragua. We have tremors all the time here. I have video footage of this thing going off before the shaking started. It is loud but if you live in a large house you might need to purchase 2.There is no doubt that this can save lives. Even for small tremors, it is great to have it to make sure your quake plan is done correctly.
I just moved to the San Fernando Valley in California, and wanted to try and hook up some kind of solution to warn us about possible earthquakes. Did lots of Amazon review research and finally decided to give this one a try. I found the whole product to be a bit elementary and basic, but nevertheless hooked it up.The first thing I noticed was that there was no volume control, only a sensitivity control.
This alarm is fine and helps a lot at night. I live in a very seismic area so I need some kind of alert for earthquakes after having a 7.6 magnitude last year. The device is really simple and honestly now I don't buy the wave marketing thing that these people have. There's a simple reason for this, the sub-woofer in my room can activate it when playing at high volumes. This is a great sub-woofer but only 8&#34; and 100 watts.
Last night a 6.4 and a 6.5 hit north of Puerto Rico at midnight. This quake was close to us and it still gave us about a 10 second headstart to get in the right mindset to face what was coming. I live in the 2nd floor of a 12 story building. I've had it in the same wall (has never fallen off) with the same battery for about 2 years, maybe more.Now even happier with this purchase.
While living in California, we used this detector In our home. It went off for minor earthquakes, and was triggered with the foreshocks of larger earthquakes. The further away the quake, the more advance notice we had. Because of the sensitivity control, we were able to set it so it did not trigger when heavy trucks drove by, but so that we got actual alerts.
Around 4:15am the entire thing fell off the wall and onto the floor. When I tell you that this thing lets out a BLOOD CURDLING squeal - I could not possibly get the idea across to you better. We both jumped out of bed, and I could not even put 2 and 2 together that this loud sound was actually this "quake alarm".
This little gadget does what it claims because it gives about like five to thirty seconds of notice before the jolt hits and that, like in football, is a big advantage. When the latest one hit, it gave me a head start to grab my backpack filled with important documents and a few other things, and head out the door, when the jolt set in, I was a few yards away in the clear street. When the big one strikes, I'll be ready. Best thirty bucks I've ever spent.
A semi truck making daily early morning deliveries half a block away would routinely set the device off until i properly tuned the sensitivity. Leave it and forget once you find the right sweet spot.One very important thing to note is where to position the device. Find a solid exterior wall. Also, come up with your own mounting system, as the provided "mounting hardware" is a joke.
This has a distinctive chime for warning of earthquakes. Must be mounted to sturdy wall as a door slam could make it go off. I am still waiting for first earthquake warning,
i saw all the reviews and dicide to buy one i live in puerto rico and earthquake is new for us like december 24 2010 we had a 5.6 earthquake--friday 18 2011 we had a 5.3 earthquake. i'm waiting for it to come.
Answer: yes