Observations of ducted magnetospheric echoes have been made at 1.91 MHz using a ground-based transmitter with peak power of 17 kW and pulse length 150 &mgr;s. The echo delays were between 250 and 260 ms and sometimes showed multiple fine structure on a scale of about 200 &mgr;s. Their direction of arrival was approximately 115¿ north of the zenith. ¿ American Geophysical Union 1988