WebEarthquakes occur because stresses build up between the plates as one plate passes another. As the plates move past one another they don't do so smoothly, rather, they snag and grind, allowing energy to build up. When the plates eventually move again this energy is released as shock or seismic waves through the Earth's crust. WebApr 1, 2015 · Results show that the STID speeds induced by Rayleigh waves, acoustic gravity waves mainly traveling in the ionosphere, and tsunami waves of the Tohoku Earthquake are 2100-3200 m/s (2.1-3.2 km/s ...

Seismic waves — Science Learning Hub

WebTypes of Seismic Waves. Large strain energy released during an earthquake as seismic waves travels in all directions through layers of the Earth, reflecting and refracting at each interface. These waves are of two major types: 1. Surface waves . It travels over the surface of the earth, and it consist of Rayleigh wave and love waves. 1.1 ... WebAug 17, 2016 · To determine centroid depth with Rayleigh wave amplitude spectra, we need reliable focal mechanisms. Figure 3 shows the bias in the best-fitting depths determined from Rayleigh wave amplitude spectra due to perturbations in dip angle, for the case of the 2008 Nevada earthquake. When the dip is perturbed by ±20°, the deviation from the true … imvu character

Types of seismic waves and how they are recorded

WebAug 3, 2012 · The authors compared the significance of Rayleigh wave signatures for the two earthquakes with regard to local time and other conditions. They concluded that the coupling between the solid earth and atmosphere was more efficient for the Wenchuan earthquake in the early afternoon at the observation sites (0628 UT) compared with the … Web摘要本文利用中国数字地震台网位于东北地区的122个宽频地震台站的18个月记录的三分量连续地震噪声数据，采用互相关方法提取了Rayleigh和Love波经验格林函数，并利用时频自动分析技术获取了相应的相速度频散曲线.通过反演频散曲线，获得了Rayleigh和Love波周期为8～35 s的二维相速度分布.结果表明 ... imvu characters babies