Life on the Fron­tier – Solar Radiation

Straw-cups down, eight min­utes to the hatch, and who still stops for the radi­a­tion monitor.

Lunar noir hard sci­ence fic­tion: Jus­tice is per­son­al, and back­up is three days away.

The alarm does not ask who is mid-sto­ry. It cuts Alex’s Bar in the mid­dle of a tab, and the first hon­est sound after the blare is a lid. Straw-cups go down. Nobody fin­ish­es the yarn. Nobody set­tles. Sher­iff Ander­son does not explain a coro­nal mass ejec­tion. He gives a hab, a cel­lar, and a clock: eight min­utes, or your insides turn to jel­ly. Carmike, run to Hab C and grab Doc. The cor­ri­dor after that is a slid­ing run in one-sixth grav­i­ty, because a bounce off a bulk­head knocks you out before you are under any­thing that counts.

The Prac­tice

Solar radi­a­tion, on this day, is not weath­er. It is a direc­tion and a dead­line. Earth has already seen the ejec­tion and sent the warn­ing. The worst pro­tons are still in tran­sit. Eight min­utes is the length of the deci­sion, not the length of the storm. You do not pack a bag. The tab is not some­thing you argue about. You get mass between your body and the Sun.

In a closed habi­tat, the prac­tice is phys­i­cal before it is pro­ce­dur­al. Liq­uid does not stay in an open glass, so the cups already have lids. In one-sixth grav­i­ty a true run is a series of bounces, so the peo­ple who have done this before slide. Hab D is the one they built a berm of regolith up the sides, stacked most of the station’s water in the room above the cel­lar, and added foam for room. McPher­son dogs the upper hatch and straps the blocks. The clock becomes the wait­ing time.

They acknowl­edge that any­one who remains out­side expe­ri­ences expo­sure after the radi­a­tion out­side reach­es over four thou­sand 100 MeV pro­tons per square cen­time­ter per sec­ond and keeps grow­ing. Doc Keller’s mon­i­tor is the only instru­ment in the room that can say when the pro­tons have actu­al­ly arrived inside. Until it climbs, the shel­ter is a bet.

The floor does not save you. Since radi­a­tion can arrive from any side in space, they con­struct­ed the habi­tats with foam beneath the grat­ing. Against a solar pro­ton event, the par­ti­cles are com­ing from one direc­tion. Shield­ing under your boots cuts the slow crust dose. It does noth­ing unless it sits between you and the Sun. Nils has already used the cheap­er ver­sions of the same rule: a room under regolith in his own hab, a crawler dri­ven into crater shade. Shade is not armor. It is geom­e­try. The prac­tice is the same sen­tence every time. Put mass in the line. Then wait for some­one with an instru­ment to say the line held.

How Peo­ple Use It

Nils buys the prac­tice whole. He does not bounce. He does not stop for the tab. When Doc resists in the infir­mary door­way, he goes down with her, then helps, because the mon­i­tor is the one thing worth the sec­onds. Lat­er, in the cel­lar, he is the one who reach­es for the floor grat­ing. The foam under their feet is spare parts today. He wants it on a crawler, point­ed at the Sun, so Doc can go after Tilly Mas­ters with­out the cab­in becom­ing the shield.

Doc refus­es the pan­ic ver­sion and accepts the sci­en­tif­ic one. Let me up. I need my radi­a­tion mon­i­tor. She will not enter a cel­lar with­out the instru­ment that tells her whether any­one left out­side is already dead. She is new. This is her first CME. She still knows which bag mat­ters. When the read­ing climbs, she is the one who says it out loud: if some­one isn’t in a shel­ter; they are dead. That sen­tence turns a miss­ing name into a rescue.

Sher­iff Ander­son uses the voice. Loca­tion, time, con­se­quence. He sends Nils for the doc­tor instead of going him­self. Some­one has to keep the room mov­ing, and some­one has to close the count. Twen­ty-five in the cel­lar. About thir­ty in the Ocean of Storms. Five names still out. He does not have a sec­ond speech.

McPher­son accepts the hatch and refus­es the floor. You’ll let the radi­a­tion in. He is not wrong to flinch. He is wrong about the direc­tion. Once Nils says the par­ti­cles are com­ing from the Sun, and the sher­iff tells the room to let the man explain, McPher­son gives the order to dig. The trust inside the cel­lar is that thin. It holds because some­one will still say the geom­e­try out loud.

Tilly does not get the bar ver­sion. She is south­west of a KREEP out­crop, off Conrad’s tow­er, run­ning for shade at the base of a cliff. The prospec­tor prac­tice is the same rule with worse tools. Rock you can­not car­ry is still rock, if you reach it. The road is stones. Fif­teen min­utes instead of five. Those min­utes are dos­es. Mil­ton is in Lon­don. The alarm can still find him. A dish, a retrans­mit, four hun­dred thou­sand kilo­me­ters. Phys­i­cal help can­not make the eight min­utes. A voice can tell some­one to get behind a mountain.

Tourists and cor­po­rate vis­i­tors do not have the same prac­tices. They still want a prop­er glass. They would pack a bag for them­selves. Peo­ple usu­al­ly think of a storm cel­lar as a hole you go down into, with down rep­re­sent­ing a direc­tion the Sun acknowl­edges. It is real­ly under­neath that mat­ters. Gen Miller is not in this room. She inher­its the sta­tion lat­er, with the same hatch, the same water, and a sher­iff whose voice is no longer the clean instru­ment it is on this night. The prac­tice does not retire because the badge gets com­pli­cat­ed. It is old­er than her shift.

Frag­ile Trust

Offi­cial law, on this night, is a hang­over and a count. Ander­son can emp­ty a bar with one sen­tence. He can­not make Tilly be in the net. He can­not make the floor foam face the sky. The cel­lar is unof­fi­cial in how mat­ters: every­one is sup­posed to know, and five peo­ple are still miss­ing when the detec­tor climbs. Inside the room, the trust breaks when Nils shifts the grat­ing. Two peo­ple shout. Doc can­not hear the phone. The sher­iff has to buy the geom­e­try back from the room before any­one will dig.

Back­up is three days away. There is no Earth hos­pi­tal in the eight min­utes, and none in the three days after. A fab­ri­ca­tion, a con­tract, a lan­der — none of them arrive faster than the pro­tons. The repair, if it is a repair, is local: foam pulled out of a floor, a crawler point­ed so the shield stays between the cab­in and the Sun, a mon­i­tor in a bag, a detox pan­el for kid­neys that are about to meet ion­ized tis­sue. Rule One is already in force before any­one says it on the south road. Sur­vive. Don’t let each oth­er die if you can help it.

The trust is pro­vi­sion­al because the offi­cial chain is already a cour­tesy. As the sher­iff takes on the roles of both the strike’s hero and the unre­li­able man for clear­ing the next room, the trust becomes increas­ing­ly pro­vi­sion­al. Gen will have to keep the same hatch-and-mon­i­tor prac­tice with a weak­er voice above her. There will be no change in the pro­tons. The lid still has to click. The hatch still has to be dogged. Some­one still has to stop for the instru­ment, and some­one still has to be wrong about the floor before the room will move.

Who is still out­side when the mon­i­tor climbs, and who in the cel­lar is will­ing to dig up the only mass they can still carry?

Fur­ther Reading

Thun­der Moon Tussle

The Luna­dyne Inci­dent and Oth­er Sto­ries — “CME”

Mask of the Joy­ful Moon

Relat­ed site posts: Life on the Fron­tier — When the Alarm Sounds, Hard Tech & Sci­ence — Storm Cel­lar, Leg­ends and Lore — Hab D, Char­ac­ter Spot­light — Doc Keller, The Three-Day Lag

The Joy­ful Moon is still watch­ing… and the lid still clicks. — Torn MacAlester Still rid­ing the trails with Nils, Gen, and the whole Fab­u­lae Lunae crew 🚀🌕