Sentence examples for motion and weak from inspiring English sources

Some of the stations showed significant differences between the S H/V of strong motion and weak events, whereas others did not.

Although it is expected to be a practical means of measurement now, the resolution perpendicular to the surface is limited to hundreds nanometers because of the difficulty in controlling the evanescent depth, and the difficulty in capturing the particle image if the particles are less than a few hundreds of nanometers caused by its very fast Brownian motion and weak fluorescence.

{text{DNL}} = sum left| {{ log }left{ {frac{{R_{text{strong}} }}{{R_{text{weak}} }}} right}} right|Delta f (1 where R strong and R weak represent the S-H/V spectral ratios for strong motions and weak motions, respectively, and ∆f is the frequency interval.

Fig. 3 Site responses calculated using the HVSR method for 16 strong-motion stations with PGA > 200 cm/s2 under strong and weak motion during the 2008 Ms8.0 Wenchuan Earthquake sequence.

By joint comparison of strong and weak motion data, we conclude that ground motion amplification is likely due to a combination of the source radiation field and site effects.

Therefore, it is possible that the fault motion was too slow and weak to be detected on seismic or high-rate GPS data.

The vertical dashed line is the boundary between strong and weak motions defined in this study.

The DNL values can quantify the difference in the Fourier spectrum between strong and weak motions and reveal the de-amplification during strong shaking in the frequency domain.

The site responses of the 33 stations in the frequency range of 0.5 20.0 Hz were calculated individually using the HVSR method for strong and weak motions, as shown in Figs. 3 and 4. Multiple HVSR curves produced a geometric mean, which was used to determine the site response under weak motions, while only one curve was available for strong motions.

Note that fNL could not be identified at four sites (51MXT, 51XJD, 62SHW, and 62WIX) because of the small difference of the HVSR during strong and weak motions, implying the absence of soil nonlinearity.

Based on Fig. 4, the site responses under strong and weak motions do not differ much for most stations at which the recorded PGAs are almost below 200 cm/s2 during the Wenchuan main shock.