Science. 1964 May 29;144(3622):1121-2. doi: 10.1126/science.144.3622.1121.
Increase in twilight glow and in the dust stripes in the twilight arch have been observed from several places in the northern hemisphere from the fall of 1963 until now. Measurements of the twilight brightness indicate a considerable increase of dustiness in the stratosphere; this turbidity may be due to drifting ashes from the eruption of Agung volcano on Bali.
自 1963 年秋季以来，从北半球的多个地方已经观测到曙光晕和曙光拱中的尘埃条纹增加。对曙光亮度的测量表明平流层中的尘埃含量显著增加；这种混浊可能是由于巴厘岛阿贡火山喷发的灰烬漂流造成的。
