Observation of a New Long-Period (16-s) Persistent Tremor Originating in the Gulf of Guinea

Xia, Yingjie1,2; Chen, Xiaofei2

2020-08-16

10.1029/2020GL088137

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

A new persistent microseismic tremor, with a narrowband period centered near 16 s, was discovered in the primary microseism spectral peak by analyzing seismic waveforms recorded by African, European, and American seismometers. This tremor may generate coherent arrivals in noise cross-correlation functions (NCFs), which could potentially bias ambient noise tomography. Using an envelope-stacking method, we discovered that the 16-s tremor source is in the coastal region of the Gulf of Guinea and is probably isolated from the previously reported 26-s tremor source. The nature of the newly identified 16-s tremor, like the 26- and 27-s tremors, is similar to a volcanic tremor radiated by the Mayotte volcanic system, thereby suggesting that the excitation of all the Gulf of Guinea tremors may be related to volcanic activities. Thus, this study implies that there may still be active volcanoes in the gulf.

persistent microseismic signal WAVE ocean wave VOLCANO noise cross-correlation function EARTH volcanic tremor LINE Gulf of Guinea

SCI ; EI

英语

通讯

National Science Foundation of China[49625406]

Geology

Geosciences, Multidisciplinary

WOS:000560376100081

AMER GEOPHYSICAL UNION

20203309060734

Seismology ; Volcanoes

Seawater, Tides and Waves:471.4 ; Seismology:484 ; Earthquake Measurements and Analysis:484.1

GEOSCIENCES

Web of Science

1.Harbin Inst Technol, Dept Mech & Aerosp Engn, Harbin, Peoples R China;
2.Southern Univ Sci & Technol, Sch Earth & Space Sci, Shenzhen, Peoples R China

Xia, Yingjie,Chen, Xiaofei. Observation of a New Long-Period (16-s) Persistent Tremor Originating in the Gulf of Guinea[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(15).

Xia, Yingjie,&Chen, Xiaofei.(2020).Observation of a New Long-Period (16-s) Persistent Tremor Originating in the Gulf of Guinea.GEOPHYSICAL RESEARCH LETTERS,47(15).

Xia, Yingjie,et al."Observation of a New Long-Period (16-s) Persistent Tremor Originating in the Gulf of Guinea".GEOPHYSICAL RESEARCH LETTERS 47.15(2020).