4/1/02 6:06:21 AM Pacific Standard Time
Kent, don't feel too bad. Apparently the radar loop you posted for Taiwan
b-4 quake is not all that unusual -- not very reliable!
I just viewed the "radar loop" and it does look spooky on
one hand, but I've seen this type of thing before too during other periods
without seismic activity. The weather in Northern Taiwan in recent days has
been -very- rainy and nasty at times with heavy downpours. This sometimes
can play tricks with radar. The weather at the time of the quake was cloudy
though. Nonetheless, The Central Weather Bureau radar facility is in downtown
Taipei and the mountainous terrain around it causes wierd radar reflections,
along with the site being located in a wide valley with very tall mountains
off to the south, east and north-east.
I've seen these same ring anomalies before during good and bad weather, I
think it's a case of the radar set itself. This radar they use is a much
older generation radar too from what I can tell as well as seen from various
local media stories sometimes featuring the CWB, It's not a more modern Doppler
system that we rely on Stateside though. One of those older 70's generation
sets before Doppler really became a useful tool.
Case in point, we've gotten clobbered by severe thunderstorms here in Tainan
County last year, one night in particular when we had a huge system of SVR
TXR cells "train" over each other from Tainan's SSW to NNE. Hugging the coastline
and clobbering the western environs of Tainan City. We were stuck for over
2 hours with cloud-to-ground lightning strikes bouncing off the buildings,
hail, copious rainfall. The towns and villages on a path that went up to
the city of ShinYing, just south of Chiayi were soaked. I thought this was
big weather news to followup on.
Well, I logged onto the Net after I got home..that same confounded radar
the CWB was showing blue colored "rain" over Tainan County. Not the heavier
reds, yellows and whites those cells should have been painted with. The only
news that night was Kaohsiung City homes were flooded out. Nothing said at
all about what happened in Tainan and points NNE! I saw cars floating down
the street, not a peep though about it.
So, view the CWB weather radar site with a grain fo salt, their seismology
site though is very good and definitely one to rely on. Different people
doing different things working at the same agency. You get differing levels
of quality many times. Just like we get back home. (LOL!)
John in S. Taiwan
Still watching it, started at quake time and seemed to quit following
the last immediate aftershock.
Radar glitch is used too often to explain these phenomena, including the
stuff we see on humdinger-spiffy advanced US gear.
But when events happen simultaneously we can't help but take note.
Scalar tech likewise tosses a whole new pale on these watches.