Related Experiment Video
Updated: Sep 24, 2025
06:55
Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
Published on: August 5, 2016
8.3K
Imaging evolution of Cascadia slow-slip event using high-rate GPS
Yuji Itoh1,2, Yosuke Aoki3, Junichi Fukuda3
1Earthquake Research Institute, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0032, Japan. yuji.itoh@univ-grenoble-alpes.fr.
Scientific Reports
|May 3, 2022
Summary
High-resolution Global Positioning System (GPS) data reveals sub-daily processes during slow slip events (SSEs). This advanced analysis provides unprecedented detail on SSE evolution and mechanisms.
Area of Science:
- Geophysics
- Tectonics
- Seismology
Background:
- Slow slip events (SSEs) are typically studied using daily Global Positioning System (GPS) data.
- Daily data limits the understanding of sub-daily processes and underlying mechanisms of SSEs.
Purpose of the Study:
- To investigate the potential of sub-daily kinematic GPS analysis for imaging SSEs.
- To overcome the temporal resolution limitations of traditional daily GPS data.
Main Methods:
- Applied post-processing techniques to 30-minute kinematic GPS data to reduce non-tectonic noise.
- Inverted high-temporal-resolution GPS data to create spatiotemporal slip images of an SSE.
- Compared results with inversions from daily GPS data.
Main Results:
- Successfully captured transient motions of a few millimeters during a Cascadia SSE using 30-minute GPS data.
- Revealed a multi-stage SSE evolution: isotropic growth followed by along-strike migration.
- Observed slip behavior similar to regular earthquake ruptures, suggesting common mechanical factors.
Conclusions:
- Sub-daily kinematic GPS analysis is feasible for SSE studies, offering improved temporal resolution.
- The findings suggest shared mechanical principles between SSEs and regular earthquakes.
- Further refinement of noise reduction in kinematic GPS analysis will enhance SSE detection and imaging.
More Related Videos
Related Concept Videos
01:30Types of Global Positioning System Surveys
129
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
129
01:03Precipitation Gravimetry
7.8K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
7.8K