Structural edge delimitation from gravity anomaly data using the directional continuous wavelet transform with an example from the Basin and Range Province of the United States

2013 ◽  
Vol 32 (12) ◽  
pp. 1462-1467 ◽  
Author(s):  
Sid-Ali Ouadfeul ◽  
Leila Aliouane
Keyword(s):  
United States ◽  
Wavelet Transform ◽  
Gravity Anomaly ◽  
Continuous Wavelet Transform ◽  
The United States ◽  
Basin And Range ◽  
Continuous Wavelet ◽  
Basin And Range Province

scholarly journals Does Heterogeneity in COVID-19 News Affect Asset Market? Monte-Carlo Simulation Based Wavelet Transform

2021 ◽  
Vol 14 (10) ◽  
pp. 463
Author(s):  
Asima Siddique ◽  
Ghulam Mujtaba Kayani ◽  
Saira Ashfaq
Keyword(s):  
Wavelet Transform ◽  
Continuous Wavelet Transform ◽  
The United States ◽  
Equity Market ◽  
Policy Implications ◽  
Continuous Wavelet ◽  
Market Prices ◽  
Jones Index ◽  
International Investors ◽  
Wavelet Coherency

The current study investigates the connectedness between US COVID-19 news, Dowes Jones Index (DJI), green bonds, gold, and bitcoin prices for the period 22 January 2020–3 August 2021. The study has employed wavelet coherency, the continuous wavelet transform, and the wavelet-based Granger causality methods to obtain the dependence result. The continuous wavelet transform (CWT) analysis reveals that the United States equity market prices are extremely sensitive with regard to spreading coronavirus (USCOVID-19) news and changes in the oil price. Green bonds, gold, and bitcoin have minimal connectedness with the equity market, which might lead to the hedge and safe haven role of these assets during the COVID-19 crisis period. Lastly, very strong comovement was found between bitcoin and gold during the entire sample. The results of the present study offer a number of fresh and noticeable policy implications for international investors and asset managers.

Regional variation and frequency dependence of Qβ in the crust of the United States

1981 ◽  
Vol 71 (5) ◽  
pp. 1531-1538
Author(s):  
Brian J. Mitchell
Keyword(s):  
United States ◽  
Frequency Dependence ◽  
Colorado Plateau ◽  
The United States ◽  
Basin And Range ◽  
Small Degree ◽  
Eastern United States ◽  
Basin And Range Province ◽  
Period Range ◽  
Attenuation Coefficients

abstract Approximate Lg attenuation coefficient values are determined for paths in eastern North America at periods between 2 and 4 sec where no data were previously available. These new data, together with reported values at a period of 1 sec, are consistent with values predicted by a frequency-dependentent Qβ of the crust in which Qβ varies as ω0.2. The new data are inconsistent with values which would be predicted by models having prominent maxima or minima in Qβ−1 within the period range 1 to 5 sec. Lg attenuation coefficients were computed for the frequency-independent crustal Qβ models of Cheng and Mitchell (1981) for the Basin and Range Province and Colorado Plateau of the Western United States. The predicted values at 1 sec for the Colorado Plateau and Basin and Range Province are about twice as large, and three times as large, respectively, as those predicted for the Eastern United States. Recently reported values of Q for 1-sec Lg in those regions are consistent with the attenuation coefficients and Q values of Lg predicted by the Colorado Plateau and Basin and Range Province models. A model with a small degree of frequency dependence of Qβ would be consistent, but is not required by the data.

The continuous wavelet transform with rotations

2005 ◽  
Vol 4 (1) ◽  
pp. 45-55
Author(s):  
Jaime Navarro ◽  
Miguel Angel Alvarez
Keyword(s):  
Wavelet Transform ◽  
Continuous Wavelet Transform ◽  
Continuous Wavelet
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