摘要： A new lava ?eld was formed at Holuhraun in the Icelandic Highlands, north of Vatnaj?kull glacier, in 2014–2015. It was the largest effusive eruption in Iceland for 230 years, with an estimated lava bulk volume of ~1.44 km3 covering an area of ~84 km2. Satellite-based remote sensing is commonly used as preliminary assessment of large scale eruptions since it is relatively ef?cient for collecting and processing the data. Landsat-8 infrared datasets were used in this study, and we used dual-band technique to determine the subpixel temperature (Th) of the lava. We developed a new spectral index called the thermal eruption index (TEI) based on the shortwave infrared (SWIR) and thermal infrared (TIR) bands allowing us to differentiate thermal domain within the lava ?ow ?eld. Lava surface roughness effects are accounted by using the Hurst coef?cient (H) for deriving the radiant ?ux (Φ rad) and the crust thickness (?h). Here, we compare the results derived from satellite images with ?eld measurements. The result from 2 December 2014 shows that a temperature estimate (1096 ?C; occupying area of 3.05 m2) from a lava breakout has a close correspondence with a thermal camera measurement (1047 ?C; occupying area of 4.52 m2). We also found that the crust thickness estimate in the lava channel during 6 September 2014 (~3.4–7.7 m) compares closely with the lava height measurement from the ?eld (~2.6–6.6 m); meanwhile, the total radiant ?ux peak is underestimated (~8 GW) compared to other studies (~25 GW), although the trend shows good agreement with both ?eld observation and other studies. This study provides new insights for monitoring future effusive eruption using infrared satellite images.