
A mining outpost carved into the Tycho crater has become the unlikely stage for a baffling lunar tremor. When chief engineer Bill Bonwitt feels the moon itself shudder, he and his radio operator Crane scramble to understand a sudden three‑and‑a‑half‑degree shift that snaps the Earth back into place as though the satellite were on a rampage. The incident rattles the base, toppling equipment and injuring a mysterious worker whose name appears on the payroll but whose past is a blank.
Amid the chaos, simmering tensions surface: a demanding supervisor suspects sabotage, while the crew wrestles with the eerie data pouring in from Earth’s observatories. The story blends hard‑won technical detail with a growing sense of unease, hinting at forces far beyond the miners’ control. Listeners are drawn into a claustrophobic, high‑stakes world where every tremor could be the first clue to a deeper mystery lurking beneath the moon’s surface.
Language
en
Duration
~36 minutes (34K characters)
Publisher of text edition
Project Gutenberg
Credits
Greg Weeks, Mary Meehan and the Online Distributed Proofreading Team at http://www.pgdp.net
Release date
Mar 14, 2021
Rights
Public domain in the USA.

1893–1968
A mechanical engineer who became a familiar name in early science-fiction magazines, this prolific pulp-era writer helped fill the genre with cosmic adventure, strange worlds, and brisk, imaginative storytelling. His stories appeared regularly in magazines such as Amazing Stories and Astounding during the genre’s formative years.
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