The Storm That Made Itself

The rain had cancelled outdoor lunch, so Maya and Soren ended up in the computer lab, which smelled like warm dust and old keyboards. Mr. Okafor was at the front desk eating a sandwich and pretending he hadn't already eaten one.

"There's an eruption happening right now," Maya said. She had found a live feed from a volcano in Indonesia, where it was the middle of the night. The screen showed a black mountain against a blacker sky, and a column rising off the top of it like smoke from a chimney built for a giant.

Soren pulled a chair over. "That's ash. Not smoke. Smoke is burning. That's just rock, ground up into powder and thrown."

Then the column flickered.

It was not the volcano glowing. It was a thread of lightning, bright and crooked, stitching itself through the middle of the ash cloud. Then another. Then three at once.

"There's no rain cloud," Maya said. She leaned in until her nose was almost on the screen. "Lightning needs a storm. That's not a storm. That's a mountain."

Soren got out his notebook. "Maybe it is a storm. A different kind."

"It's not raining there. Look how dry the sky is around it."

They watched. The lightning came in clusters, dozens of strikes crawling up and down the column. It did not behave like the lightning Maya knew. Storm lightning came down. This climbed. It tangled inside the ash like veins inside a leaf held up to the sun.

"Where's it getting the electricity from," Soren said. Not really a question. He was talking his way into it.

Maya pulled her feet up onto the chair. "From the ash."

"Ash can't make electricity."

"Then why is it only happening inside the ash." She pointed. "Not above it. Not beside it. Inside it."

Soren looked at that for a while. He scrubbed his sock against the carpet, then reached out and touched the metal leg of the desk. The little snap stung his finger.

He did it again. Sock on carpet. Finger to metal. Snap.

"Maya."

"What."

"Rub your feet on the carpet."

"Why."

"Just do it."

She did. She touched the desk and yelped and laughed at the same time. "That's just static. From rubbing."

"From things rubbing," Soren said. He was writing fast now, the way he did when his head felt too small. "My sock and the carpet. Two things touching, over and over, scraping. The electricity wasn't in either of them. It got made when they rubbed."

Maya stopped laughing.

She looked back at the screen, at the ash column, and she went very still in the way she did when something was about to line up.

"How many pieces of ash are in there," she said.

"Millions. Billions. More than that." Soren followed her eyes up the column. "It's not falling gently. It got blasted up. Everything in there is moving. Fast."

"So they're hitting each other." Maya's voice dropped almost to nothing. "The whole way up. Billions of little rocks, slamming and scraping past each other, the whole time, all at once."

They looked at each other.

"It's the carpet," Maya said. "The whole cloud is the carpet. And the sock. And the finger. All of it, at the same time."

A fresh burst of lightning forked through the column, brighter than the rest, and for a second the inside of the ash lit up gold from within, like something breathing.

Soren sat back. "So nobody brings the storm," he said slowly. "There's no cloud. No rain. The mountain throws up enough broken rock, moving fast enough, and the rock makes its own lightning out of nothing but rubbing against itself."

"It makes the storm by being a storm," Maya said.

Mr. Okafor wandered over, still chewing. "What are you two watching that's so quiet?"

"Volcanic lightning," Soren said.

"Ah." Mr. Okafor nodded the way adults nod when they want to seem finished with a subject. "People have seen that forever, you know. Old sailors used to report it. Pliny the Younger wrote about something like it almost two thousand years ago, lightning in the cloud over Vesuvius."

Maya turned around. "How does it work?"

Mr. Okafor opened his mouth. Then he paused. He looked at the screen, at the climbing veins of light, and something honest crossed his face.

"You know," he said, "I'm not actually sure anyone explained it properly until pretty recently. People watched it for thousands of years before they figured out the how." He shrugged and drifted back toward his sandwich. "Long time to wonder about a thing." "Two thousand years," she said. "Pliny saw this. Sailors saw it. Everybody saw it and nobody knew. And we just" - she waved her hand at the desk, at the carpet, at Soren's stinging finger - "we just figured it out with our socks."

"We didn't figure it all out," Soren said. "There's tons we don't know. Why some eruptions make thousands of strikes and some make almost none. What it could tell us about how big an eruption is, if we listened to the lightning instead of waiting to see the ash."

Maya's eyes went wide. "You could warn people. From the other side of the world. Just by counting the flashes."

"Maybe. Somebody's probably trying." He wrote that down too.

The column on the screen surged. A whole cage of lightning lit up at once, dozens of strikes, the ash glowing from the inside like a jar full of fireflies, and the sound did not reach them because the sound was eight thousand miles and several hours away, still traveling, or already gone.

Maya pressed her sock flat against the carpet and held it there, feeling the small charge gather under her foot, watching a mountain on the far side of the night build its own lightning out of nothing but broken rock and motion.