See the comment from BFC member ouchicutmyself, a survivor of the Kobe earthquake, in the thread linked below:
http://www.bladeforums.com/forums/showthread.php?s=&threadid=170078
He listed the contents of his BOB in this thread:
http://www.bladeforums.com/forums/showthread.php?s=&threadid=172771
Below are listed some items that I carry or feel I should be carrying. I live just south of you across the border, so I am in an e-quake area too. These are items for *SHORT TERM* survival and care that should be immediately available and transportable (small daypack size bag maybe). This quick 'n dirty list assumes that you have with you clothes that can protect you from the environment and weather.
- cell phone, even though the cells will likely be dead or overloaded. It might work, so think of it like a bit of insurance. Plus many of the phones are tiny and light enough that there is little weight/space penalty for carrying them.
- whistle, your voice dies after a bit of screaming/yelling but you can blow a whistle intermittently for days. Flat whistles or the Fox 40 (or mini-40) carry small. Have several scattered around your kit & body.
- LED flashlights, note the plural, carry several. Be sure to carry EXTRA spare batteries, preferably lithiums. Power may be out after the tremor, so provide your own light. Headlamps preferred because they free your hands up for aiding others, working, balancing, etc. The Petzl Zipka is almost non-existant in terms of weight and space occupied. My EDC is 2 ea Inova Mini-LED single bulb lights that never leave my body, plus an Inova X5MT in a pocket during waking hours. For more info specific to flashlights check out
the Candlepower Forums.
- bandanna (or several), useful as a dust mask (better when dampened) or bandage or ....
- swim goggles to keep dust out of your eyes. The minimalist ones are little more than two lens-cups and enough elastic to hold them together.
- dust masks like painters wear, carry lots since they nest together compactly, they are cheaply available at home centers or hardware store or online.
- gloves I just carry a pair of the rubber-palmed ones currently popular at home centers for a few bucks. They are reasonably durable. Their downside is condensation under the rubber part and no wind/weather protection. A pair of well-fitting leather ones might be better, as was recommended by the Kobe earthquake survivor.
- at least 1 liter water, preferably more, for hydration and sanitation of wounds. If your "grab 'n go" bag is a hydration pack, you should have 2-3 liters right there. At the office/vehicle location stash lots of extra bottled water. At home, large barrels are the size quantities you should be considering.
- sturdy but comfortable shoes/boots, you may need to traverse hazardous rubble/debris on your way to safety.
- a roll of toilet paper double-bagged in the heavier Ziploc Freezer Bags. If you have a vacuum sealer, I recommend vacu-packing it in their even heavier and sturdier bags to reduce its bulk.
- duct tape, preferably a full roll, to repair gear and improvise bandages.
If you think you may be inside a collapsed building after the shaking is over, consider carrying a prybar and/or other tools (fire axe/hatchet, geologist's or framing hammer, Hooligan tool (the ultimate

), crescent wrench/Vise-Grips, carbide-tipped window breaker, etc) usually used to break *into* buildings or vehicles as your tools of choice to break *out* of the building. If money is no consideration, a Ti (titanium) prybar is lighter than steel.
HTH.