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Related to hypocenter: reverse fault, Fault scarp


The surface position directly beneath the center of a nuclear explosion.

hy′po·cen′tral (-sĕn′trəl) adj.


(ˈfoʊ kəs)

n., pl. -cus•es, -ci (-sī, -kī), n.
1. a central point, as of attention or activity.
2. a point at which rays of light, heat, or other radiation meet after being refracted or reflected.
a. the focal point of a lens.
b. the focal length of a lens.
c. the clear and sharply defined condition of an image.
d. the position of a viewed object or the adjustment of an optical device necessary to produce a clear image: out of focus.
4. (of a conic section) a point having the property that the distances from any point on a curve to it and to a fixed line have a constant ratio for all points on the curve.
5. the point of origin of an earthquake.
6. the primary center from which a disease develops or in which it localizes.
7. to bring to a focus or into focus: to focus the lens of a camera.
8. to concentrate: to focus one's thoughts.
9. to become focused.
[1635–45; < Latin: fireplace, hearth]
fo′cus•a•ble, adj.
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References in periodicals archive ?
In order to get a higher resolution of the hypocenter location of the events, in these article four seismic sequences were post processed with an initial manual location, and then a cross correlation to obtain an order of magnitude more precise than first motion picks as in Waldhauser and Ellsworth (2000) and relocated with the double difference relocation algorithm.
But the two earthquakes - with hypocenter depths between 50 and 60 km--did not occur in the contact between the two tectonic plates as is usually expected, but rather within the Cocos plate as it bends downward within the mantle.
A major study of atomic bomb survivors, called the Life Span Study, has found that of the nearly 90,000 people who were within 10 kilometers of the hypocenter of those blasts--thousands of whom received frighteningly high initial doses of radiation and continued exposure for months because of contaminated food, water, and air--the lifetime cancer death toll rose by only 0.
8 (according to the United States Geological Survey) struck Ecuador with the hypocenter in Manab Province in the northwest part of the country, causing widespread damage to residences, schools and other buildings, killing more than 660 people and resulting in approximately 30,000 evacuees.
Similar hypocenter depths (between 7 and 19 km) were reported in the northern part of Moravia (Spacek et al.
3), the hanging wall on the east side of the Kamishiro fault plane moved upwards with respect to the footwall on the west side, and the kinematic inversion of the main shock and the distribution of the aftershock foci suggest that ruptured fault plane dips steeply, almost vertically near the hypocenter of the main shock (see the cross-sectional view in Fig.
The hypocenter was near Accumoli city in the Italian region Latium, located about 110 kilometers northeast of Rome.
HYPO71, a computer program for determining hypocenter, magnitude and first motion pattern of local earthquakes, pp.
A grid search method with an anisotropic velocity model was used for AE hypocenter localization.
Gallagher, "Earthquake hypocenter location using genetic algorithms," Bulletin of the Seismological Society of America, vol.
Its epicenter was east of the district of Lamjung, and its hypocenter was at a depth of approximately 8.
A monolith now stands on ground zero, or the hypocenter of the blast from which destruction emanated over a 2.