MICROSEISMS IN NEW ENGLAND—CASE HISTORY OF A STORM

Geophysics ◽  
1947 ◽  
Vol 12 (4) ◽  
pp. 639-650 ◽  
Author(s):  
L. Don Leet
Keyword(s):  
New England ◽  
Case History ◽  
Rayleigh Waves ◽  
Cold Front ◽  
Meteorological Conditions ◽  
History Of ◽  
Seismograph Station ◽  
Better Than

A microseismic storm recorded at the Harvard Seismograph Station November 14–16, 1945 is analyzed. Associated meteorological conditions are described. Rayleigh waves and Q‐waves are identified. Rayleigh waves are used to determine the direction of approach of the microseisms. It is found that the microseisms did not radiate from the center of the barometric low and that at the height of the storm they approached the station from several directions. The position of the cold front associated with the storm correlated better than that of the barometric low with the directions from which microseisms were observed.

Microseisms in New England—Case History II*

1948 ◽  
Vol 38 (3) ◽  
pp. 173-178
Author(s):  
L. Don Leet
Keyword(s):  
Surface Layer ◽  
Nova Scotia ◽  
Pressure Gradient ◽  
New England ◽  
Case History ◽  
Rayleigh Waves ◽  
Cold Front ◽  
Low Pressure ◽  
Storm Center ◽  
Set Up

Abstract Rayleigh waves recorded on the three components of the Harvard station are used to determine the direction of approach of microseisms. In Case History I, it was observed that microseisms did not radiate exclusively from the center of a well-developed low-pressure storm area and that they remained strong and continued for many hours after the storm center moved inland over Nova Scotia, northeast of the Harvard station, coming at that time from east, southeast, and south. In Case History II, a short but distinct microseismic storm ran its course as a cold front advanced to the coast and out over the ocean, but there was no atmospheric storm system within the region covered by the U. S. Weather Map. It is proposed that microseisms are generated when a pressure gradient of magnitude as yet undefined moves over the crust and, in effect, kneads the surface layer in such a way as to set up vibrations.

scholarly journals CASE HISTORY OF THE CAPE COD CANAL

2000 ◽  
Vol 1 (3) ◽  
pp. 21
Author(s):  
John E. Allen
Keyword(s):  
New England ◽  
Sea Level ◽  
Case History ◽  
Cape Cod ◽  
Narrow Neck ◽  
History Of ◽  
Recent Origin ◽  
Northern New England

No more interesting or appealing subject than the Cape Cod Canal could be assigned to one who is engaged in the study and development of navigation in New England. This sea-level canal, located 50 miles south of Boston at the narrow neck of land joining Cape Cod to the mainland, principally serves coastwise shipping to and from Boston and Northern New England. While it was only completed in 1940 no one should entertain the thought that it is of recent origin.

Unlocking Reserves, Fracturing Tight Gas-Condensate Bearing Sandstone: The Case History of a North African Field (Algeria)

2013 ◽  
Author(s):  
Lucio Bertoldi ◽  
Raffaele Perfetto ◽  
Francesca Rinaldi ◽  
Gabriele Carpineta ◽  
Luis Granado ◽  
...  
Keyword(s):  
Case History ◽  
Gas Condensate ◽  
Tight Gas ◽  
North African ◽  
History Of

Deep Workover Challenges of an HP/HT Sour Gas Well - Case History of Mutriba 12

2011 ◽  
Author(s):  
Mohammed Jasem Al-Saeedi ◽  
Fayez Abdulrahman Al Fayez ◽  
Dakhil Rasheed Al Enezi ◽  
mahesh sounderrajan ◽  
Mishary Najeeb Al-Mudhaf ◽  
...  
Keyword(s):  
Case History ◽  
Gas Well ◽  
History Of ◽  
Sour Gas
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