First, the science is really really bad. Large methane deposits in the mountains of Fairbanks is not too likely - gold, yes. Second, the CGI of cracks in surface snow somehow going deep into ancient bedrock - not even close. Humorously, the cracks always showed up just where someone happened to be - those cracks must have it out for humans. Even if the methane was twice as low as the -25 degrees F it would not instantly freeze a fully cold-weather clothed person in half a second or so of exposure. In fact you could expose that person to a quick vent of liquid nitrogen, ballpark -321 degrees F, for the same period of time and probably nothing would happen. The random buried cannon snow blasts to represent methane venting looked more like a July 4 pyrotechnic. Placing a Geologic Services cabin in an obvious avalanche pathway was pure dumb.
Second, the portrayal of the military as dumb-ass and shoot any citizen for the most trivial reasons was pure Hollywood. The actor's portrayal of the rebellious daughter, nerdy son and, yes-dear, mother were all stereotypical and thankfully forgetful. The script was so bad that fast forwarding was the only escape. Really dumb was the decision when, of course conveniently, a snow crack separated the parents from kids so they decide to hike up the mountain to join each other rather than down or even to just jump across those parts that were separated by just a few feet.
Third, the ending where a couple of hand held explosives stopped the massive cracks was so ridiculous that fast forwarding again was the only escape.
Fourth, usual made-for-TV actor's filmography of TV series, TV movies and video games so you know what to expect.