Sadeghi Chorsi Taha, Gallant Elisabeth, Forster Lichen, Dixon Jacqueline E, Dixon Timothy H
School of Geosciences, University of South Florida, 4202 E. Fowler Avenue NES 107, Tampa, 33620-5250 FL USA.
Department of Geology, University of Hawai'i at Hilo, 200 W. Kāwili, Hilo, 96720-4091 HI USA.
Bull Volcanol. 2025;87(8):62. doi: 10.1007/s00445-025-01847-8. Epub 2025 Jul 7.
We collected rapid-repeat radar data capturing the deformation of the active Halema'uma'u summit lava lake surface on January 19, 2023, an otherwise quiescent period during the January-March 2023 eruption. Radar interferograms were generated every 90 s over a 90-min period of intermittent inflation using a scanning real aperture radar operating at Ku-band (17.4 mm wavelength). This technique allows observation of phenomena at a temporal scale and spatial resolution not previously possible. We model the intrusion as a shallow sill, 10 to 100 m below the lava lake surface. We suggest that frequent intrusions of such small volume pulses of gas-rich magma help to provide the flux of heat and mass necessary to compensate for cooling, outgassing, and recycling of dense degassed magma to deeper levels, sustaining the lava lake during periods of near-steady-state.
The online version contains supplementary material available at 10.1007/s00445-025-01847-8.
我们收集了快速重复雷达数据，该数据捕捉到了2023年1月19日活跃的哈勒马乌马乌火山口熔岩湖表面的变形情况，这是2023年1月至3月火山喷发期间的一个相对平静的时期。在90分钟的间歇性膨胀期间，使用工作在Ku波段（波长17.4毫米）的扫描实孔径雷达每90秒生成一次雷达干涉图。这项技术能够以前所未有的时间尺度和空间分辨率观测各种现象。我们将此次侵入模拟为一个位于熔岩湖表面以下10至100米的浅岩床。我们认为，富含气体的岩浆的这种小体积脉冲频繁侵入，有助于提供补偿冷却、排气以及将致密的脱气岩浆循环至更深层所需的热量和物质通量，从而在接近稳态的时期维持熔岩湖的存在。
在线版本包含可在10.1007/s00445-025-01847-8获取的补充材料。
