...Chandan K. Saikia Abstract The earth model proposed earlier (Saikia and Herrmann, 1985a) is tested by modeling the short-distance waveforms from the earthquakes of 15 July 1983 (UTC 14h 46m 02.97s) and 18 July 1983 (UTC 05h 20m 01.08s) recorded at hard-rock sites in the Miramichi aftershock zone...

... corner of the 1982 aftershock zone. Sporadic activity was also recorded from the western side of the zone.Composite P -nodal solutions for three subzones are consistent with the conjugate pattern of thrust faulting obtained in previous studies, except for rotation of fault-plane strikes from northerly...

... feature of the aftershock activity is the delineation of a conjugate, V-shaped pattern along a W-E vertical profile. Differences in focal depth, which range between 3–9 km for Miramichi hypocenters and 5 to 22 km for Charlevoix hypocenters, can be attributed to differences in the depth where brittle...

... of the Reasenberg and Jones aftershock decay model. The average values obtained for the region fall in the range of the corresponding values of the parameters for earthquakes in California; however, the aftershock sequences in eastern Canada are less energetic on average, and one event (the 1982 Miramichi...

... ° 62 ° FIG. 1. Major faults, granitic intrustions, and 1982 earthquake aftershock zones in New Brunswick. Geology is taken from Williams (1978). The 1982 Miramichi earthquakes are notable in many regards. The main shock, with magnitude of 5.7, is the largest earthquake in eastern Canada since...

...Charles S. Mueller; Edward Cranswick Abstract Source parameters are derived from 111 locally recorded three-component seismograms of 40 aftershocks (magnitude = 1.0 to 3.5) of the 9 January 1982 Miramichi, New Brunswick, earthquake. This data set greatly expands the set of three-component data...

... parameters of the Miramichi aftershocks were conducted by Cranswick et al. (1982) and Mueller and Cranswick (1985). We analyze here the short-period vertical P waves from the events in Table 1 recorded at the RSTN station RSNY, in the Adirondack Mountains of New York at an epicentral distance...

... and Central New Hampshire , Vols. I-II , August, 1983 . Wetmiller R. (1984) . Long term aftershock activity in the Miramichi, New Brunswick aftershock zone (abstract) , SSA Eastern Section Fall Meeting , St. Louis, Missiouri...

...Shutian Ma; Dariush Motazedian Abstract On 9 January 1982, in the Miramichi region of New Brunswick, Canada, an earthquake with body-wave magnitude ( m b ) 5.7 occurred, and extensive aftershocks followed. The mainshock was felt throughout Eastern Canada and New England, USA. The mainshock...

.... The earthquakes range in seismic moment from 5 × 10 23 to 3 × 10 26 dyne-cm and include the mainshocks and largest aftershocks of the 1982 Miramichi, Canada, the 1985 to 1988 Nahanni, Canada, and the 1988 Tennant Creek, Australia, earthquake sequences. The teleseismic recordings of these earthquakes...

.... The predicted counts of events are still smaller than those observed in the Charlevoix seismic zone in the twentieth century, even if the magnitude of the 1663 earthquake was as large as M  7.5. Moreover, such a large mainshock ( M  7.5), if it had an aftershock sequence as productive as Miramichi, would...

... × 1024 dyne-cm, with an uncertainty factor of 1.5. The results from a July 1983 field survey of Miramichi aftershocks, conducted jointly by Geological Survey of Canada (GSC) (formerly, the Earth Physics Branch, Department of Energy, Mines and Resources of Canada) and USGS, have shown that they were...

...T.-C. Shin; R. B. Herrmann Abstract Using data from earthquakes in the 1982 Miramichi earthquake source zone, spectral excitation and attenuation of the Lg phase are studied. With data in the distance range of 135 to 994 km, interpretation is complicated by the presence of high-frequency Sn and Pn...

... Earthquake Epicentre File (SHEEF) catalog for the New Brunswick region using the GSC's regional completeness dates ( Table 1 ) and are shown in Figures 1A , 2A , and 3A . The catalog used is complete to the end of 2000. The Miramichi aftershock sequence was removed, though the four largest events...

... that aftershocks do not exhibit the same scaling as main shocks. The high-frequency spectral levels of the aftershocks of both the Nahanni and the 9 January 1989 Miramichi, New Brunswick, earthquakes imply stress parameters that increase with magnitude. By contrast, the spectral levels for a series of main shocks...

... a shallow epicenter just northwest of Newbury. The main shock was followed by a very energetic and long-lasting aftershock sequence, similar to that following the 1982 earthquake at Miramichi, New Brunswick. The 1727 earthquake may have occurred on a northwest-southeast-striking thrust fault whose trend...

... Rates and Estimated Aftershock Activity Rates for the Charlevoix Seismic Zone, 1900–2015 M Observed Number of Events Observed Rate Per Decade Predicted ( M  7.0) Rate Per Decade Predicted ( M  7.5) Rate Per Decade 5.8 M ≥1 0.088 0.019 (0) 0.049 (1) 5.3 M ≥2 0.175 0.049...

.../A N Guinea 12/22/1983 6.4 11 km Y NE (Trans-Am Frac. Zone) WNW-ESE Not Known N/A N/A N/A N Ghana 1939 6.5 ∼16 km Y NE (Akwapim Fault) E-W (Coastal Bound. Fault) Not Known N/A N/A N/A N Miramichi, Canada 1/09/1982 5.7 ∼7 km Y Conjugate Fault Conjugate Fault Y ∼10...

... to 7.2, with six of the events in Europe, two in North America, and one in Australia. Three of the European events are from the anomalously deep Vrancea seismic zone in Romania. Four of the main shocks (Tennant Creek, 1988; Swabian Jura, 1978; Lleyn, 1984; and Miramichi, 1982) had active aftershock...

... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 627 Bufe, Charles G., David H. Warren, and Christi Scofield--Aftershocks of the 22 November 1977 379 313 Earthquakes at Willits, California: Activity in the Maacama Fault Zone Bullitt, John T. and M. Nail ToksSz--Three-Dimensional Ultrasonic Modeling of Raleigh Wave 193 Propagation 1395 Bungum, H., S...