Bulletin of the Seismological Laboratory for the period from 1 January 1975 to 31 December 1979

Smith, G.M.; Ryall, F

doi:10.3133/ofr81231

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…Surface faulting at the northern end of the rupture splayed from the range front, bordered a pediment for several kilometers, and extended 5 km into the San Bernardino Valley basin; at the southern end, surface faulting appears to have died out in bedrock, along a range front (Dubois and Smith, 1980;Bull and Pearthree, 1988). The 1887 earthquake segment consisted of at.least two and possibly three structural segments (Pearthree, pers.…”

Section: Sonora Mexico Earthquakementioning

confidence: 99%

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Proceedings of conference XLV; a workshop on Fault segmentation and controls of rupture initiation and termination

Schwartz¹,

Sibson²

1989

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Section: Sonora Mexico Earthquakementioning

confidence: 99%

“…Considering the maximum depth of microseismicity to represent the thickness of the brittle crust, a few events, indeed, have been recorded at depths between 20 and 28 km (Smith and Ryall, 1980). A more significant cutoff, however, appears to be in the 13 to 15 km range.…”

mentioning

confidence: 99%

Proceedings of conference XLV; a workshop on Fault segmentation and controls of rupture initiation and termination

Schwartz¹,

Sibson²

1989

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The 1989 earthquake swarm beneath Mammoth Mountain, California: An initial look at the 4 May through 30 September activity

Hill

Ellsworth

Johnston

et al. 1990

Bulletin of the Seismological Society of America

102

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Mammoth Mountain is a 50,000- to 200,000-year-old cumulovolcano standing on the southwestern rim of Long Valley in eastern California. On 4 May 1989, two M = 1 earthquakes beneath the south flank of the mountain marked the onset of a swarm that has continued for more than 6 months. In addition to its longevity, noteworthy aspects of this persistent swarm include (1) an exponential-like increase in the rate of activity through the first month; (2) a vertically oriented, planar distribution of hypocenters at depths between 6 and 9 km with a north-northeast strike (roughly perpendicular to the average T-axis orientation for the swarm earthquakes); (3) recurring spasmodic bursts (rapid-fire sequences of similar-sized earthquakes with overlapping coda) and occasional earthquakes with enhanced low-frequency energy; (4) a uniform temporal distribution of the four largest (M ≈ 3) events over the first 4 months of the swarm with a cumulative seismic moment for the entire sequence through 30 September corresponding to a single M ≈ 4 earthquake; (5) a b-value of 1.2; and (6) submicrostrain perturbations on the nearby borehole dilatometer, the first of which led the onset of swarm activity by more than 2 weeks. These aspects of the swarm, together with its location along the southern extension of the youthful Mono-Inyo volcanic chain, which last erupted 500 to 600 years ago, point to a magmatic source for the modest but persistent influx of strain energy into the crust beneath Mammoth Mountain.

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Bulletin of the Seismological Laboratory for the period from 1 January 1975 to 31 December 1979

Cited by 2 publications

References 7 publications

Proceedings of conference XLV; a workshop on Fault segmentation and controls of rupture initiation and termination

Proceedings of conference XLV; a workshop on Fault segmentation and controls of rupture initiation and termination

The 1989 earthquake swarm beneath Mammoth Mountain, California: An initial look at the 4 May through 30 September activity

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