The earthquake that rattled the Newport Beach area April 7 was centered at the mouth of the lagoon at Newport Dunes Aquatic Park, according to revised estimates released Wednesday by Caltech.
The lagoon, located on the channel leading from Newport Bay to Upper Newport Bay, is just north of East Coast Highway and is part of a marina and a recreation vehicle park.
Caltech also slightly reduced its estimate of the earthquake's magnitude, from 4.6 to 4.5.
Jim Compas, assistant dockmaster at the marina, said he was sitting in his office only a few yards from the epicenter when the sharp but brief quake struck at 1:07 p.m.
"It kind of threw me, first north, then south," Compas said. He said his most vivid memory of the quake was dust shaking loose from nearby condominium buildings and rising hundreds of feet into the air.