Effects of the 1964 Alaskan Earthquake on Glaciers and Related Features

Describes an aerial photographic reconnaissance in Apr and Sept 1964 of the approx 30,000 sq mi area most seriously affected by the Mar 27 earthquake to assess the extent to which glacial features had been modified. Little change was apparent in glacial basins, lakes or tidewater calving, much less than after the 1899 and 1958 earthquakes of comparable violence. Some rock slides on to glaciers were impressive. The effects are related to the Tarr and Martin (No 17449) theory of earthquake avalanche supply, but it may be several years before evidence to test the applicability of the theory to the 1964 earthquake is apparent. 25 air photos with detailed descriptive notes illus the features described. Condensed version of the text was pub in Arctic 1965. v 18, no 2, p. 135-37

EuFe2_2As2_2 under high pressure: an antiferromagnetic bulk superconductor

We report the ac magnetic susceptibility $\chi_{ac}$ and resistivity $\rho$ measurements of EuFe$_2$As$_2$ under high pressure $P$. By observing nearly 100% superconducting shielding and zero resistivity at $P$ = 28 kbar, we establish that $P$-induced superconductivity occurs at $T_c \sim$~30 K in EuFe$_2$As$_2$. $\rho$ shows an anomalous nearly linear temperature dependence from room temperature down to $T_c$ at the same $P$. $\chi_{ac}$ indicates that an antiferromagnetic order of Eu$^{2+}$ moments with $T_N \sim$~20 K persists in the superconducting phase. The temperature dependence of the upper critical field is also determined.Comment: To appear in J. Phys. Soc. Jpn., Vol. 78 No.