Tremor is a rhythmic, involuntary, oscillatory movement of a body part resulting from alternating or synchronous contractions of reciprocally innervated muscles, typically around a joint. Phenomenologically, tremors are characterized by their frequency, amplitude, distribution, and activation condition (rest, postural, kinetic, or intention). They arise from pathological or physiological alterations in central motor networks, particularly involving cerebello-thalamo-cortical and basal ganglia circuits, and can be modulated by peripheral feedback. Tremor is a core motor phenomenon in various neurological disorders, where its spatiotemporal features are crucial for differential characterization, quantification, and pathophysiological investigation.
Two earthquakes were recorded within hours of each other near Marion, North Carolina, and witnesses report they felt shaking miles away, according to the U.S. Geological Survey.
Earth Sciences
Oct 27, 2025
0
39
How do volcanoes work? What happens beneath their surface? What causes the vibrations—known as tremor—that occur when magma or gases move upward through a volcano's conduits? Professor Dr. Miriam Christina Reiss, a volcano ...
Earth Sciences
Oct 13, 2025
0
96
What lies beneath Fickle Hill in northern California? Maybe the answer to an earthquake mystery that has puzzled seismologists for decades.
Earth Sciences
Aug 20, 2025
0
64
Scientists have uncovered a key piece of the puzzle behind the unusual "slow earthquakes" occurring off the east coast of New Zealand's North Island.
Earth Sciences
Aug 18, 2025
0
97
On May 12, 2008, the magnitude 7.9 Wenchuan earthquake shook central China, its destructive tremors spreading from the flank of the Longmen Shan, or Dragon's Gate Mountains, along the eastern margin of the Tibetan Plateau.
Earth Sciences
Aug 13, 2025
0
105
On July 30, one of the largest earthquakes ever recorded struck off the Kamchatka peninsula, in Russia's far east. Within minutes, tsunami warnings were issued in Russia, much of Asia and across the Pacific in Hawaii, New ...
Environment
Aug 4, 2025
0
232
A new paper reveals that ground acceleration from moonquakes, rather than meteor impacts, was responsible for shifting lunar landscapes at the moon's Taurus-Littrow valley, where Apollo 17 astronauts landed in 1972. The study ...
Planetary Sciences
Jul 30, 2025
0
112
Today at about 11:30am local time, a magnitude 8.8 earthquake struck off the coast of Russia's Kamchatka Peninsula in the country's far east.
Earth Sciences
Jul 30, 2025
0
37
Wednesday's magnitude 7.3 earthquake off Alaska's Aleutian Islands chain struck in a region that has experienced a handful of powerful quakes within the last five years—including one that shook communities almost exactly ...
Environment
Jul 18, 2025
0
41
An earthquake with a preliminary 6.2 magnitude struck off the Pacific coast of Panama on Monday, authorities said. No injuries or damage were immediately reported.
Environment
Jul 14, 2025
0
29
