Earthquake in Tokyo

I have experienced them, but only slightly.  I guess that makes me lucky.

There was one in Elwood a few years back - maybe a year ... Isn't that area on a fault line?

 Elwood isn't mentioned.  Apparently the fault is in southern Indiana, but was probably felt in Elwood.

 

Source, with map:   http://www.columbia.edu/cu/record/archives/vol28/vol28_iss15/Pg8-2815.pd...

  On June 18, 2002, a
magnitude 5.0 earthquake
occurred in
southern Indiana, followed by
a 1.2 magnitude aftershock on
June 25, 2002. Because the
region of occurrence, the
Wabash Valley Seismic Zone,
is seismically active, Won-
Young Kim, a seismologist
with Columbia’s Lamont-
Doherty Earth Observatory,
conducted research to determine
the potential hazard of
future earthquakes to this
region. His findings suggest
that an ancient fault line dating
back to the Precambrian era of
geological history (from 4.6
billion to 570 million years
ago) has become reactivated
and was the likely cause of the
June 2002 earthquakes. Kim
is presenting his findings at the
Seismological Society of
America in May, and publishing
in the Bulletin of the Seismological
Society of America.
Through analysis of highquality
broadband waveform
data from the June 18 earthquake,
Kim determined that
the earthquake's epicenter
occurred at a depth of 18±2
km (11.2 miles) below ground
level, deeper than most earthquakes
in stable continental
regions. By combining this
location with the June 25
aftershock, which occurred at
20 km depth, Kim suggests
that the earthquakes can be
attributed to a steeply dipping
fault, known as the Caborn
Fault, associated with a rift
system once responsible for
the breakup of an ancient
supercontinent.
"Old continental crust contains
a billion-year record of
past tectonic activity. This area
was once as seismically active
as the Gulf of California is
today,” said Kim. “The reactivation
of this fault may be due
to the forces that are moving
the North American Plate over
the Earth's mantle. The depth
of this earthquake suggests
that these forces are quite
large, even though they are far
away from present plate
boundaries."
The June 2002 earthquake is
one of the largest seismic
events instrumentally recorded
for the Wabash Valley Seismic
Zone, which extends to
southeastern Illinois, southwestern
Indiana and parts of
western Kentucky. This zone
is considered a source of
strong earthquakes with geological
evidence of prehistoric
earthquakes of up to a magnitude
of 7.5.
The Wabash Valley Fault
System, a fault system within
the Seismic Zone, is probably
the best documented fault system
in the eastern United
States due to past petroleum
exploration in the area, yet
seismologically it is poorly
understood. It is known that
many of the Wabash Valley
faults extend into rocks from
the Precambrian era, to at least
7 km depth.
Kim's research is the first to
directly correlate an earthquake
with one of the known
faults in the Wabash Valley
Fault System. His findings
suggest that the strike-slip
faulting on this Caborn fault
was happening on a near vertical
fault plane at 18 km
depth, indicating that ancient
buried faults associated with a
possible Precambrian rift system
are being reactivated by
contemporary compressive
stress.
"We don't yet understand
how faults are reactivated, but
it appears that some pre-existing
faults are more likely to
break than others. The study of
this sequence should help us to
determine the likelihood of
future occurrences. More
research on these anomalous
quakes is required," said Kim.

no this was 2008 or 2007 small one

The Fortville Fault Line also extends through a majority of. Madison County

Good find, Braveheart!  Many thanks for that~!

  I felt that one,early in the morning,lasted only a second or two. Don't remember who's fault that one was, part of the new madrid I think.