Does anyone know the kill radius of the average person bomb? Seriously, I'm actually embarrassed that I don't know this and never gave it any thought before. Seems like an important bit of info when planning a response.
I know something of not-so-smart bombs. The answer is "It depends". It depends on which explosive (most common used to be semtex out of Pardubice, Czechosovakia), how much is used, storage conditions of the explosive, how it is shaped, how it is detonated, placement, sharpnel augmentation, etc.
Since the suicide bombs tend not to be tamped or shaped, most of the blast goes straight up. Notice hot air raises, or if you touch off a container of gasoline, the fireball goes nearly straight up (depending on the wind and other environmental conditions)?
If you're standing ten meters away from the blast, but you have a meter thick enforced concrete wall inbetween you and the blast, you'd probably survive a rather large untamped and unshaped charge. If you are 50 meters away, but a large display of glassware or nails are inbetween you and the blast... Well, nice knowing you and hope it's a closed casket funeral.
Sharpnel plays a very important role, obviously, in antipersonnel explosions. The concussion wave loses energy very quickly. Sharpnel on the other hand stays lethal for much longer distances.
As a rule of thumb, in the open with no obstructions or sharpnel producing objects, 75m to a 100m should be survivable. Something strong (ie, thick walls) inbetween you and the bomb would cut that distance dramatically. Watch out for falling sharpnel, tho.