The 2012 July 6 X1.1 flare at S13W59 and a halo coronal mass ejection (CME) with a space speed of ~1900 km s?1 were associated with type III and type II radio bursts. The metric-to-decametric type II radio burst extended down to ~5 MHz. Simultaneously, a slowly drifting feature with a harmonic structure was observed by Wind and Solar Terrestrial Relations Observatory radio receivers around and below 1 MHz, above the strong type III radio burst at lower frequencies. The radio direction-finding analysis of this lower-frequency interplanetary (IP) type II radio burst indicates that the radio source was located near the nose and possibly toward the southern flank of the CME-driven shock. These results provide an independent confirmation of the previous suggestions that when the metric and IP type II bursts are overlapping, the lower-frequency IP type II radio burst originates near the shock nose, whereas the source of the higher-frequency metric type II burst is closer to the Sun in the shock flank region. These results further support the idea that the coronal and IP type II bursts are produced by the same CME-driven shock.
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机译：III型和II型无线电爆发与2012年7月6日在S13W59发生的X1.1耀斑以及空间速度约为1900 km s？1的晕冕日冕物质抛射（CME）有关。公制到十制的II类无线电脉冲串扩展至〜5 MHz。同时，风和太阳地面关系天文台无线电接收机在1 MHz左右及以下观察到了具有谐波结构的缓慢漂移特征，该无线电接收机在较低频率下处于强III类无线电突发之上。对这种低频II型行星际（IP）无线电猝发的无线电测向分析表明，该无线电源位于机鼻附近，并可能朝向CME驱动的冲击的南翼。这些结果独立地证实了先前的建议，即当度量标准和IP类型II突发重叠时，低频IP类型II无线电突发起源于电击鼻附近，而频率较高的度量II型突发源是在冲击侧翼区域更靠近太阳。这些结果进一步支持了冠状和IP II型爆发是由相同的CME驱动的电击产生的想法。
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