Received: 24 November 2020
Accepted: 3 February 2021
First Online: 15 February 2021
Ethics approval and consent to participate
: This study did not involve human participants. Data for this study are publicly available from the United States Geological Survey Archives. Therefore, we did not need any ethical approval.
: Not applicable.
: The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
: The authors declare that they have no conflict of interest.