Hard Tech & Sci­ence – Eight Minutes
A CME alarm, a cel­lar under Hab D, and the water stacked over your head while 100 MeV pro­tons arrive.

Moon base hard sci­ence fic­tion: air, water, pow­er, and the nar­row buffers that keep the habi­tats alive.

The speed of light will get you a warn­ing. It will not get you shel­ter. When a coro­nal mass ejec­tion leaves the Sun, Con­rad Sta­tion has on the order of eight min­utes before the most ener­getic par­ti­cles arrive. Radi­a­tion is a spacer’s worst ene­my. A CME is the worst of that.

In CME, the alarm hits Alex’s Bar in the mid­dle of a tab Nils is try­ing to set­tle. Sher­iff Ander­son does not give a speech. He gives a loca­tion and a clock: Hab D, the cel­lar, eight min­utes, or your insides turn to jelly.

The Constraint

There is no mag­ne­tos­phere worth the name and no thick atmos­phere to stop a pro­ton. At a hun­dred MeV, a pro­ton is mov­ing at about forty per­cent of the speed of light. It does not dump its ener­gy in a neat skin burn. It dri­ves a line through tis­sue, knock­ing elec­trons loose, ion­iz­ing as it goes — cell wall, DNA, the slow can­cers Doc Keller is already think­ing about while the par­ti­cles are still arriving.

Num­bers from the cel­lar: over four thou­sand 100 MeV pro­tons per square cen­time­ter per sec­ond, and ris­ing. Doc’s ver­dict, once the detec­tor climbs, is not diplo­mat­ic. If some­one is not in a shel­ter, they are dead.

Earth habits get peo­ple killed here. Stop­ping for a bag. Assum­ing the warn­ing reached every­one. Assum­ing “out­side the net” still means you have time. Tilly Mas­ters was south­west after a KREEP out­crop, out of Conrad’s tow­er, and did not get the alert. She saw the rad sen­sors go wrong and ran for crater shade. Twen­ty min­utes. Far too long.

How It Works at Conrad

The orig­i­nal sta­tion piled lunar regolith up the sides of Hab D until it was effec­tive­ly under­ground. Most of the station’s water sat in the room above the cel­lar. Water and ceil­ing foam between the Sun and the peo­ple. McPher­son dogs the upper hatch, straps foam blocks over it, and the clock becomes wait.

That archi­tec­ture was nev­er a polar storm cel­lar by design. Builders con­struct­ed the habi­tats for space, where radi­a­tion can come from any side. On the Moon, the CME is direc­tion­al. Shield­ing under the floor does almost noth­ing against par­ti­cles com­ing from the Sun. It may help with crustal back­ground. It will not help today. Nils pulls up the grate and foam because the mass is in the wrong place, and because they need enough extra shield­ing in a crawler to take Doc out to Tilly with­out fry­ing on the South Road.

A crater wall works the same way, if you can get behind it: rock between you and the source. Nils has rid­den one out that way. He has also sat under his own hab’s regolith. None of it is per­fect. All of it is geom­e­try. Put mass between the par­ti­cle and the body. Do it in eight min­utes, or do not be on the surface.

What Fails First

The warn­ing net fails first. Then the assump­tion that thir­ty peo­ple in the area means thir­ty peo­ple in the cel­lar. They are miss­ing five. Milt John­son is in Lon­don. Var­gas and Richards check in. Tilly does not. Lunadyne’s Earth-side offices are late on the east coast. Nils does not wait. He has Milt warm a GNR anten­na in Alas­ka and retrans­mits through four hun­dred thou­sand kilo­me­ters to a woman behind a mountain.

Com­mu­ni­ca­tions can still be almost real-time. Phys­i­cal help can­not. There is no Earth hos­pi­tal in the eight min­utes, and there is none in the three days after. Doc goes because Rule One of the prospec­tor codes is Sur­vive — not as a slo­gan, as an agree­ment not to let each oth­er die if you can help it. The crawler is faster than it should be on a road that gets rock­i­er the far­ther south it runs. The med­ical prob­lem wait­ing at the far end is not a reac­tor leak. It is a par­ti­cle that burns through liv­ing cells, and the near­est advanced cen­ter is still a three-day lag away.

The mar­gin is the cel­lar, the water, the foam, and who­ev­er is still count­ing heads when the detec­tor climbs. Eight min­utes is not a metaphor. It is the length of the decision.

Fur­ther Reading

• The Luna­dyne Inci­dent and Oth­er Sto­ries — “CME”
• Thun­der Moon Tussle
• Mask of the Joy­ful Moon
• Relat­ed site posts: Char­ac­ter Spot­light – Doc Keller, The Three-Day Lag, Hab D, Life Sup­port Mar­gins, Nils Carmike (Revis­it­ed)

The Joy­ful Moon is still watching…
and the mar­gins still have to hold.

— Torn MacAlester
Still rid­ing the trails with Nils, Gen, and the whole Fab­u­lae Lunae crew
🚀🌕

Stories The sto­ries of Torn MacAlester are sci­ence fic­tion, where the sci­ence is well-ground­ed. I inten­tion­al­ly made any devi­a­tions for spec­u­la­tive pur­pos­es. To main­tain max­i­mum real­ism, I restrict the scope of these deviations. Read More

Articles I write arti­cles of sci­ence fact and sci­ence fic­tion. The arti­cles here span the knowl­edge of mod­ern sci­ence and the spec­u­la­tions of fic­tion. I try to caveat every­thing that is an assump­tion. You will find arti­cles about space­flight, the pos­si­bil­i­ties of alien con­tact, and descrip­tions of tech­nol­o­gy used in my stories. Read More

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