ML19312E463
| ML19312E463 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 04/01/1980 |
| From: | Wohl M Office of Nuclear Reactor Regulation |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8006040485 | |
| Download: ML19312E463 (1) | |
Text
l ApR 1 1980 MEMORANDUM F08:
G. Knighton, Chief, Environmental Evaluation Branch, D0R FROM:
M. Wohl, Environmettal Evaluation Branch, D0R THRU:
W. Pasedag, Section A Leader, Environmental Evaluation Branch, D0R
SUBJECT:
SEISMIC ACTIVITY NEAR HT. ST. HELENS, WASHINGTON Substantial seismic activity has been observed in the vicinity of Mt. St. Helens, in southwest Washington State, over the last two ays. A total of eighty-eight earthquakes has been recorded, the maximum Richter Scale magnitute being 4.5.
Tb frequency of this activity now seems to be declining. Mt. St. Helens is an active volcano.
The volcano began spewing forth light ash, fumes, and steam at 1:30 'p.m. PST, Thursday, March 27. Between 3:00 and 4:00 a.m., March 28, these emissions in-creased in intensity, although no lava has been ejected.
The emissions have risen to a height of 26,000 feet and are being carried eastward by the pre-valling winds, with the ash falling out within 10 miles of Mt. St. Helens.
None of.this activity has been felt at the Trojan Nuclear Plant.
The sources of this information are Frahk Baldwin of the USGS field office at Newport, Washington and Mike Malmros, USNRC Region V inspector at the Trojan Nuclear Plant, Odginalsignd by Millard L. Wohl Environmental Evaluation Branch Division of Operating Reactors cc; H. Denton D. Eisenhut B. Grimes W. Kreger L. Barrett' h
DISTRIBUTION:
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