Here's the swarm:
1.5 2001/10/21 19:06:41 34.069N 118.397W 8.4 0 km ( 0 mi) ESE of Beverly Hills, CA
1.5 2001/10/21 18:11:50 34.078N 118.367W 1.5 3 km ( 2 mi) ESE of West Hollywood, CA
2.9 2001/10/21 17:28:57 34.073N 118.398W 4.0 0 km ( 0 mi) NE of Beverly Hills, CA

And a couple scattered as well for added effect:
1.3 2001/10/21 18:16:56 34.331N 118.497W 11.2 6 km ( 4 mi) SSE of Newhall, CA
1.5 2001/10/21 17:36:33 34.129N 118.415W 0.0 3 km ( 2 mi) SW of Studio City, CA
1.6 2001/10/22 01:35:59 33.997N 118.228W 13.0 5 km ( 3 mi) NNW of South Gate, CA

This is an article from a favorite local radio station (we get excited at 2.9's now):
Small Earthquake Shakes Up Big Area of West L.A.
Los Angeles (KFWB) 10.21.01, Updated 7:20p -- A small Magnitude
2.9 earthquake struck at 5:28pm Sunday directly under Beverly Hills.
It was followed eight minutes later by an apparent aftershock with a magnitude of
1.5.

There was also an apparent aftershock of Magnitude 1.5 at 6:11pm, centered 3
miles ESE of West Hollywood, and a M1.5 in about the same spot as the
original under Beverly Hills at about 7:06pm. Whether or not a
smaller earthquake is technically an aftershock is a human decision,
classified by a seismologist such as Dr. Kate Hutton of Caltech,
based on the fault surface of the original earthquake and whether it
is reasonable to assume the later, smaller earthquake is
mechanically connected to the first...and therefore in a sense
caused by it.

Those magnitudes and locations are preliminary, produced by the
Southern California Seismic Network computers without the
intervention of human scientists, who are more skilled at detecting
errors and false computer assumptions.

The preliminary computer calculations suggest these earthquakes
were very shallow, explaining why they were felt over a wide area
for such small magnitudes.

This M2.9 earthquake under Beverly Hills was the fourth in a series
that began Sunday afternoon, September 9. They have all been on
or near the south-dipping southern slope of the Santa Monica
Mountains-Hollywood Hills thrust structure.
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Apparently it was load and widely felt.

Canie