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contact us

Ho-kwang (Dave) Mao, Director of EFree
hmao at
tel.: 202-478-8960


Russell Hemley, Associate Director of EFree
rhemley at
tel.: 202-478-8900


Malcolm Guthrie, EFree Chief Scientist
mguthrie at
tel.: 202-478-7963


Susana Mysen, EFree Project Administrator
smysen at
tel.: 202-478-1083

Mailing address:
EFree Center
Geophysical Laboratory
5251 Broad Branch Rd., NW
Washington, DC 20015-1305
Tel.: 202-478-1083
Fax.: 202-478-8901