In the meanwhile, "groups of friends" may privately plan and execute trips to Zion. There can be no Club sponsorship or approval and participants should avoid mention inside Zion N.P. or in correspondence of the Sierra Club and their membership unless asked directly.
All applicants must be Sierra Club members and have participated in at least five Club hikes or trips. Club members wishing to enroll in the course should send a self-addressed, stamped business-size envelope to Alice Bannister Danta, LTC Registrar, 4448 Sunnycrest Drive, Los Angeles, CA 90065-4827. Completed application forms must be returned to the Registrar NOT LATER THAN September 30, 1993.
AND LAST CHANGE RANGE
Smaller quakes in the Coso Range near Ridgecrest
A 6.0 earthquake centered in the Eureka Valley at 4:21pm on May 17 rolled across a wide area of California & Nevada but no injuries or serious damage were reported. The quake was the first in this area since 1896 when a 8.4 quake shook the area.
The quake was strongly felt in California's Death Valley but did not damage Scotty's Castle, a restored 1920s mansion that is a popular tourist attraction in Death Valley National Monument.
"We had 15 seconds of good motion," said park Ranger Kate Neilsen. "It made our chandeliers swing but didn't do any damage. The castle is so structurally sound that we don't worry."
There were more than a dozen detectable aftershocks within the first 90 minutes after the quake, said Steve Bryant, a seismic analyst at Caltech. The largest of the aftershocks was a magnitude 4.0 at 4:41pm.
The quake was the strongest in California since last June 29 when the magnitude 7.8 Landers quake and its 6.7 Big Bear aftershock rocked Southern California. Those quakes killed one person, injured 402 and caused nearly $100 million in damage.
The quake was centered in an extremely remote area of eastern California not far from the Nevada border. Preliminary measurements indicated the epicenter was between the lnyo Mountains and the Last Chance Range, roughly 30 miles northwest from the northern boundary of Death Valley National Monument.
Later on May 20, a moderate earthquake shook an eastern California volcanic area Thursday, part of a swarm of tumblers that might be related to a strong quake that was widely felt earlier in the week.
The magnitude 4.7 jolt at 1:14pm was centered in the Coso Range volcanic and geothermal field about 35 miles north-northeast of Ridgecrest and about 70 miles south of Monday's magnitude 8 quake in Eureka Valley, which is northwest of Death Valley National Monument.
It was felt in Ridgecrest and China Lake and was followed by several aftershocks up to magnitude 3.3 in the next two hours, said Nick Scheckel, a seismic analyst at the California Institute of Technology in Pasadena. No damage or injuries were reported, Ridgecrest police Lt. John Lovgren said.
The 4.7 tremor was part of a seismic swarm that started Sunday with a batch of quakes measuring 2 and 3 on the Richter scale. The swarm subsided just before Monday's Eureka Valley quake, then started up again Thursday, said Al Katzenstein, a geophysicist at the China Lake Naval Weapons Station.
The swarm seemed like "a precursor to the Eureka Valley quake," he said in a telephone interview. "The two may be totally unrelated, but the coincidental activity is a little hard to overtook. On a regional picture, I don't think it's coincidence."
From the Fresno Bee, Antelope Valley Press, Ridgecrest Daily Independent & the L.A. Times