共 50 条
A decade of earthquake activity at Taupo<overline> Volcano, New Zealand
被引:0
|作者:
Illsley-Kemp, Finnigan
[1
]
Herath, Pasan
[1
]
Chamberlain, Calum J.
[1
]
Michailos, Konstantinos
[2
]
Wilson, Colin J. N.
[1
]
机构:
[1] Victoria Univ Wellington, Sch Geog Environm & Earth Sci, POB 600, Wellington 6140, New Zealand
[2] Univ Lausanne, Inst Earth Sci, Lausanne, Switzerland
来源:
VOLCANICA
|
2022年
/
5卷
/
02期
关键词:
Seismology;
Earthquake;
Volcano-seismology;
Taupo;
Caldera;
Monitoring;
LAKE TAUPO;
MAGNITUDE SCALE;
B-VALUES;
SEISMICITY;
ERUPTION;
TREMOR;
ZONE;
EVOLUTION;
MOMENT;
REGION;
D O I:
暂无
中图分类号:
P3 [地球物理学];
P59 [地球化学];
学科分类号:
0708 ;
070902 ;
摘要:
Taupo<overline>, New Zealand, is an active caldera volcano that in recent times has erupted on average every similar to 500 years, with the latest explosive eruption in 232 +/- 10 CE. Monitoring at Taupo<overline> is challenging as there has been no eruptive activity in documented history; however Taupo<overline> does undergo periods of unrest on roughly a decadal timescale, such as in 2019. Key to identifying these unrest periods is the establishment of what represents 'normal' inter-unrest activity. In this study, we generate and present a detailed earthquake catalogue for Taupo<overline> for 2010-2019 inclusive, consisting of 46,481 earthquakes. This record shows that the Taupo<overline> region has background earthquake rates of 50-200 earthquakes per month and that the 2019 unrest episode was preceded by an exponential increase in earthquake rate. We also show that when attenuation is accounted for there is no evidence for low-frequency earthquakes at Taupo<overline>, and that this is an important consideration for volcano monitoring as low-frequency earthquakes are often used to determine magma movement.
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页码:335 / 348
页数:14
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