A Moment Magnitude Scale
It is well known that the most widely used earthquake magnitude scales, ML (local magnitude), M, (surface wave magnitude), and mb (body wave magnitude), are, in principle, unbounded from above. It is equally well known that, in fact, they are so bounded, and the reasons for this are understood in terms of the operation of finite bandwidth instrumentation on the magnitude-dependent frequency characteristics of the elastic radiation excited by earthquake sources.
Hanks, T.C. and Kanamori, H. 1979, A moment magnitude scale: Journal of Geophysical Research, v. 84, p. 2348-2350.
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Public Hearings
The Forest Service will host its remaining two public meetings in Queen Valley on October 8 and in Tempe on October 10.
Video & Materials
A video presentation – the same information introduced at each public meeting – as well as meeting materials (posters and newsletter) are available for public review.
Draft EIS Released
The Draft Environmental Impact Statement (DEIS) for the Resolution Copper Project and Land Exchange is now available for review under the 'EIS Info' tab.
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Media & General Info
Point of Contact
John Scaggs
Tonto National Forest
john.scaggs@usda.gov
Apache Leap Special Management Area
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