A Study of the 2012 January 19 Complex Type II Radio Burst Using Wind,   SOHO, and STEREO Observations
  We report on a case study of the complex type II radio burst of 2012 January 19 and its association with a white light coronal mass ejection (CME). The complexity can be described as the appearance of an additional type II burst component and strong intensity variation. The dynamic spectrum shows a pair of type II bursts with fundamental harmonic structures, one confined to decameter-hectometric (DH) wavelengths and the other extending to kilometric (km) wavelengths. By comparing the speeds obtained from white-light images with that speed of the shock inferred from the drift rate, we show that the source of the short-lived DH component is near the nose. 
T.B. Teklu, A.V. Gholap, N. Gopalswamy, S. Yashiro, P. M\"akel\"a, S.   Akiyama, N. Thakur and H. Xie
astro-ph.SR