Field relations between the spectral composition of ground motion and hydrological effects during the 1999 Chi‐Chi (Taiwan) earthquake
Bibliographic record
Abstract
The possibility that the frequency content of ground motion in earthquakes affects hydrological responses to earthquakes has yet to be extensively tested in the field. The M w = 7.6 Chi‐Chi earthquake provided an opportunity to do so, as widespread liquefaction and groundwater level changes were recorded by instrumentation in the Choshui Alluvial Fan. Analysis of the resulting data shows that ground motion parameters that measure low‐frequency ground motions are more strongly correlated with coseismic groundwater level change and the occurrence of liquefaction than parameters that measure high‐frequency motions. Notably, horizontal peak ground acceleration, a metric often used to enumerate the strength of ground motion in liquefaction analysis, is weakly correlated with these hydrological effects. It is unclear from this analysis whether low‐frequency ground motion caused coseismic groundwater level change and liquefaction or whether the hydrological changes changed the spectral composition of the observed seismograms during the Chi‐Chi earthquake.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".