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.