Explosion dynamics of pyroclastic eruptions at Santiaguito Volcano
Explosion dynamics of pyroclastic eruptions at Santiaguito Volcano
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圣地亚哥火山火山碎屑喷发的爆炸动力学
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
W. Rose
中科院分区：
文献类型：
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作者：
Jeffrey B. Johnson;A. Harris;S. Sahetapy;R. Wolf;W. Rose
2003年1月，我们用热、次声和地震传感器监测了危地马拉火山的爆炸。从2个红外温度计的热数据允许计算羽流上升速度，从8到20米/秒不等。上升率与累积热辐射相关，表明上升速度较快的羽流对应于具有较大热通量的爆炸。上升速度和弹性能之间的关系不太清楚。地震辐射可能不会很好地与热输出和/或上升速度成比例，因为一些热分量可能与被动脱气有关，这不会引起显著的地震活动。但是非脉冲气体释放仍然能够产生高的热通量，这是对浮力上升速度的主要控制。
In Jan. 2003 we monitored explosions at Santiaguito Volcano (Guatemala) with thermal, infrasonic, and seismic sensors. Thermal data from 2 infrared thermometers allowed computation of plume rise speeds, which ranged from 8 to 20 m/s. Rise rates correlated with cumulative thermal radiance, indicating that faster rising plumes correspond to explosions with greater thermal flux. The relationship between rise speeds and elastic energy is less clear. Seismic radiation may not scale well with thermal output and/or rise speed because some of the thermal component may be associated with passive degassing, which does not induce significant seismicity. But non‐impulsive gas release is still able to produce a high thermal flux, which is the primary control on buoyant rise speed.