User talk:RockBandit

Questions? Comments? Discussion about articles? Let's hear it!

Welcome

Again, welcome! Chris Roy 05:43, 19 Apr 2004 (UTC)

I second that emotion! Welcome! :) jengod 05:22, Jun 2, 2004 (UTC)

Hello everyone, thank you! :) Look forward to seeing you guys around here. :D User:RockBandit 06:02, Jun 2, 2004 (UTC)

Parkfield CA geology

There is nothing subjective about why the earthquakes occur so regularly at parkfield - this is the conventional geologic wisdom. Which article do you think should include this info? (Parkfield, California or Parkfield earthquake.) Leonard G. 07:18, 11 Dec 2004 (UTC)

Ah, perhaps I used the wrong word, I apologize. However, the reason why earthquakes have appeared in Parkfield at (mostly) regular intervals since 1857 is still a mystery to scientists. The original entry:

The reason that earthquakes occur so regularly here is that it lies about midway on a fault segment between a locked segment to the south (last major earthquake 1883) and a creeping segment to the north where two tectonic plates are continuously moving without major earthquakes. As the earthquake was eleven years overdue it lends some credence to the folk saying "a watched pot never boils". The additional time did offer the opportunity to add improvements in instrumentation as the technology was further developed.

The fact that the fault south of Parkfield is locked and north of it moves aseismically doesn't have much of a bearing on whether or not earthquakes happen at regular intervals.

References to this:

Interaction of the San Andreas fault creeping segment with adjacent great rupture zones and earthquake recurrence at Parkfield

RockBandit 07:32, Dec 11, 2004 (UTC)

I reinserted the section into the article but used the qualifier "may". I have (in support of a research scientist) built a slip-strike computer model as a cellular automata that exhibits the freqency-magnitude characteristics of actual earthquakes (and of mechanical models using brick, sandpaper, and spring). Next year I will have time to do some work on this model and plan to modify it to 1.) exhibit aftershocks, and 2.) allow specification of creeping segments. With an transition ramp (of friction) between creeping and and locked segments I will be able to see if the model shows the regular and moderate earthquakes in the ramp region and where they occur. It will be especially interesting to see if the south to north aftershock sequence is reproduced.

By the way, a cut and paste article split hardly qualifies as one of the "Articles I've created" and probably should not go on your resumé as such. Leonard G. 18:28, 11 Dec 2004 (UTC)

I'm not trying to create some sort of personal vendetta between us. I felt your edits weren't appropriate for the article. That said, I suppose inserting "may" is an alright compromise at the moment. I still feel this section should be cleaned up more and some of the content checked for further accuracy. (e.g. The epicenter of the Fort Tejon Earthquake). RockBandit 19:06, Dec 11, 2004 (UTC)

That does look out of place, way too far south for inclusion in the Parkfield article, but current thought is that the Fort Tejon quake started at the northern end - variously north of Parkfield to around Cholame. The other large quake in this segment is an 1833 event; can you find the reference for that? I have edited in a section of the Fort Tejon earthquake. There is currently no article on that quake and your creation of an article would be a welcome addition to this theme of WP. (I have no time currently to research and create such an article,) Thanks, and best wishes, Leonard G. 02:06, 12 Dec 2004 (UTC)

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