We report the observation of a Moreton wave in Ha at 4:37-4:41 UT on November 3, 1997. The same region was simultaneously observed in soft X-rays and EUV, and wave-like disturbances (an "X-ray wave" and "EIT wave") were also found. The propagation speed of the X-ray wave (630 km / s) is almost the same as that of the Moreton wave (490 km/s). The EIT wave (170 km/s) is much slower than the Moreton wave. Assuming that the X-ray wave is an MHD fast shock, we can estimate the propagation speed of the shock, based on the MHD shock theory and the observed soft X-ray intensities. It is found that the estimated fast shock speed is 400-760 km/s, in rough agreement with the observed propagation speed of the X-ray wave. The fast mode Mach number of the X-ray wave is estimated to be about 1.15-1.25. These results suggest that the X-ray wave is an MHD fast shock propagating through the corona and hence is the coronal counterpart of the Moreton wave, but the EIT wave is not.
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机译：我们报告了1997年11月3日在4：37-4：41 UT的HA中的Moreton波的观察。在软X射线和EUV中同时观察到相同的区域，以及波浪状扰动（“X射线”还发现了波“和”EIT波“）。 X射线波（630 km / s）的传播速度与Moreton波（490km / s）的传播速度几乎相同。 EIT波（170公里/秒）比Moreton波慢得多。假设X射线波是MHD快速冲击，我们可以根据MHD震动理论和观察到的软X射线强度来估计冲击的传播速度。结果发现，估计的快速冲击速度为400-760 km / s，与X射线波的观察到传播速度粗略一致。 X射线波的快速模式Mach数量估计为约1.15-1.25。这些结果表明X射线波是通过电晕传播的MHD快速冲击，因此是Moreton波的冠状对应物，但EIT波不是。
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