Skillet Seared Salmon with Creamy Cilantro Lime Sauce

skinless salmon fillets (about 1-inch thick)

ground cumin

ground coriander

cayenne pepper ((to taste))

Salt and freshly ground black pepper

natural sour cream

green onions (, end trimmed, roughly chopped)

packed cilantro ((mostly leaves, some stem))

fresh lime juice

garlic (, sliced)