This is a short update.
Reports from yesterday (22-October-2020) on Stöð 2 (Channel 2) report that there is a strong smell of Sulfur dioxide from Grænavatn lake. Some increase in one hots spring in Krýsuvík volcano has been reported. That might because of change in water pathways in the crust because of the earthquake on 20-October-2020. New cracks have also formed and the earthquake caused small landslides on the coastline closest to the earthquake. The cracks in the ground are dangerous and people should not go to the coastline in this area of Iceland now. A new earthquake can happen at any time without warning.
Automatic GPS data is suggesting that in Krýsuvík volcano there has been a fast inflation of magma. I don’t think this is displacement because of the earthquake based on other nearby GPS stations.
Icelandic News
Brún Krýsuvíkurbjargs sprungin og varasöm eftir jarðskjálftana (Stöð 2/Vísir.is, pictures, video)