Put radish slices in a mixing bowl and sprinkle with salt. Let it sit for 15 minutes. You will see the moisture extracted from the radish on the bottom of the bowl. Discard the liquid and reserve the radish.
Add Korean chili flakes, garlic, fish sauce, sugar, vinegar, and sesame seeds to the radish; toss well and set aside.
For the pico de gallo
Toss together tomatoes, onion, jalopeño, cilantro, lime juice, salt and pepper in a mixing bowl. Taste and adjust the seasoning according to your preference.
For the salmon
In a small mixing bowl, combine garlic powder, onion powder, cumin, oregano, paprika, salt, & pepper; mix well. Sprinkle the mixture over the salmon but not on the skin side. Gently pat the mixture down to the salmon.
Heat oil in a skillet over medium-low heat. Place salmon skin side up and cook for 4-5 minutes. Reduce the heat to low if needed to not to burn the spice to much. Flip the salmon to the other side and continue to cook for another 4-5 minutes. Do not over cook the salmon. You can also cook the salmon in a grill pan or BBQ grill.
Put salmon on to a cutting board and rest for 1-2 minutes. Using a fork, cut the salmon flesh off the salmon skin into a large bite size. Discard the salmon skin.
To serve; put a few pieces of salmon pieces and Korean radish salad into a tortilla. Top with pico de gallo, and sour cream.