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A violent rift in the dense surface of a magnetar that has been warped by its own intense magnetic field.

[star + quake, on the model of earthquake.]
References in periodicals archive ?
Neutron stars emit radiation across the spectrum, but observing in the X-ray band offers the greatest insights into their structure, the ultimate stability of their pulses as precise clock "ticks," and the high-energy, dynamic phenomena that they host, including starquakes, thermonuclear explosions, and the most powerful magnetic fields known in the universe.
The starquakes, reported by the space agency last night, are allowing astronomers to learn about the stars' age, size and evolution.
Also like the Crab, its surface appears quiescent, free from the starquakes that rumble through magnetars.
Because Kepler-10 is one of the brighter stars being targeted by Kepler, scientists were able to detect high frequency variations in the star's brightness generated by stellar oscillations, or starquakes.