See also this interview with George Kourounis, who was able to take soil samples from the crater: https://www.npr.org/2022/01/15/1073331370/for-50-years-the-gat

See also this interview with George Kourounis, who was able to take soil samples from the crater: https://www.npr.org/2022/01/15/1073331370/for-50-years-the-gates-of-hell-crater-has-burned-now-officials-want-to-put-it-ou https://www.npr.org/2022/01/15/1073331370/for-50-years-the-g...