... ( NTS ) explosions and 21 earthquakes located within about 100 km of NTS which were recorded on short-period seismographs at the Tonto Forest Observatory in central Arizona at an epicentral distance averaging 530 km. The events in the data set cover a magnitude range from 3.3 to 4.8 ( m b ) for which P...

...R. R. Blandford Abstract The on-line operation of an automatic event detector has been evaluated at the Tonto Forest Observatory short-period seismic array. For 31 seismometers and one fixed threshold, the 90 percent incremental detection threshold on the Kuril Island beam, centered at Delta = 70...

... prediction studies indicate that the signals are highly nonstationary in space. INTRODUCTION This paper deals with the analysis of four local seismic events recorded at Tonto Forest Seismological Observatory in Central Arizona. These events were small ex- plosions detonated by the U.S. Geological Survey...

... ) explosions and nearby earthquakes recorded at Tonto Forest Observatory in Arizona. Regional phase signals from two additional stations, the Uinta Basin Observatory array in Utah and the Blue Mountains Observatory array in Oregon, and from supplemental events, including aftershocks of the 1966 Caliente...

... are to be analyzed. Their comparison with observation can also be useful for making inferences about the underlying crustal structure. The latter approach has been applied to the P arrivals across the Tonto Forest Seismological Observatory ( TFSO ) array, Arizona. On the basis of these observations, the Mohorovičić...

...Lane R. Johnson abstract The extended array at the Tonto Forest Seismological Observatory in central Arizona has been used to measure dT/d Δ of direct P waves from 212 earthquakes in the distance range between 30 and 100°, and these data have been inverted to obtain a velocity model for the lower...

...DAVID H WARREN Abstract The U.S. Geological Survey conducted a seismic-refraction study of the earth's crust and upper mantle near the Tonto Forest Seismological Observatory (TFO), located 10miles south of the Mogollon Rim near Payson in central Arizona. Two recording lines 400 km long intersect...

...) to recordings at the Tonto Forest Observatory seismometer array. For a signal with zero vector slowness, F can be written (1) where d tk is the seismogram at time sample t recorded at seismometer k , K is the total number of seismometers, and T is the number of samples over which F...

.... Simpson,and P. Richards(1993).Discriminationof earthquakes and explosionsin the eastern United States using regional high-frequencydata, Geophys. Res. Lett. 20, 1507-1510. Murphy,J. andT. Bennett(1982).A discriminationanalysisof short-period regional seismic data recorded at Tonto Forest Observatory,Bull...

... of short-period regional seismic data recorded at Tonto Forest Observatory , Bull. Seism. Soc. Am. 72 , 1351 - 1366 . Patton H. J. (1988) . Application of Nuttli's method to estimate yield of Nevada Test Site explosions recorded...

.... R. Bennett J. J. (1982) . A discrimination analysis of short-period regional seismic data recorded at Tonto Forest Observatory , Bull. Seism. Soc. Am. 72 , 1351 - 1366 . Pomeroy...

....) Blandford R. R. (1974) . An automatic event detector at the Tonto Forest Seismic Observatory , Geophysics , 39 , 633 - 643 . Freedman H. (1967) . Estimating earthquake magnitude , Bull. Seism...

.... C. Jackson W. H. (1965) . A seismic refraction survey in the vicinity of the Tonto Forest Seismological Observatory, Arizona , Trans. Am. Geophys. Union , 46 , 155 . Wright C...

... from records at the Tonto Forest Seismological Observatory, Payson, Arizona , Ann. Geofis. 18 , 365 - 397 . Eaton J. P. O'Neill M. E. Murdock J. N...

... Study of Elastic Waves in a Layered Sphere, A, by Victor Gregory Gregson, Jr 959 Murray, G. FNote on Strong Motion Records from the June 1966 Parkfield, California, Earthquake Sequence 1259 Near-Surface Dispersion Studies at Tonto Forest Seismological Observatory, by A. Frank Linville and Stanley J...

.... and T. J. Bennett (1982). A discrimination analysis of short- we believe that it would be especially useful in monitoring period regional seismic data recorded at Tonto Forest Observatory, for small, clandestine underground nuclear tests that could Bull. Seism. Soc. Am. 72, 1351-1366. occur far from...

... blasts (submitted for publication) . Murphy J. R. Bennett T. J. (1982) . A discrimination analysis of short-period regional seismic data recorded at Tonto Forest Observatory , Bull...

.... (1982) . A discrimination analysis of short-period regional seismic data recorded at Tonto Forest Observatory , Bull. Seism. Soc. Am. 72 , 1351 - 1366 . Nuttli O. W. (1981) . On the attenuation of Lg waves in western...

... recent results. Murphy and Bennett (1982) have found, comparing Nevada Test Site explosions to nearby earthquakes as observed at the Tonto Forest Observatory in Arizona, that explosion Lg is lower in frequency than earthquake Lg. They also find that the ratio Pg to Lg is a discriminant but that at single...

..., the Earthquake Data Reports distributed by the USCGS, and upon which the Preliminary Determination of Epicenters cards are based, list a magnitude of 4.3 for Tonto Forest Observatory and magnitude 5.5 for the worldwide standardized seismograph station at Nurmi- jarvi, Finland. ACCURACY OF LOCATION An indication...