The characteristics of radiation and propagation of seismic waves required in various seismological applications, especially in seismic hazard assessment, are estimated in northern Finland based on records of local earthquakes (~ 80 records from four stations, M_w ~ 1.5 to 4.1, h ~ 3 to 25 km). Northern Finland possesses relatively low seismic activity; however, rather strong earthquakes occurred there in the past. We applied coda-normalization method to estimate the quality factor Q(f)~ Q₀fⁿ and then verified and corrected the Q(f) estimates at low frequencies by stochastic simulations. We obtained Q₀~ 80 to 100, n ~ 1.1 to 1.2 for hypocentral distances of ~ 20 to 150 km, and Q₀~ 180 to 350, n ~ 0.7 to 0.9 for hypocentral distances of ~ 150 to 320 km. Other parameters were estimated by the empirical methods and stochastic simulation of local earthquakes (M_L > 2.0). We estimated the stress drop (∆σ ~ 200 bars), geometrical spreading (as a two-segment function: 1/R for R ~ 0 to 80 km and 1/80 for R ~ 80 to 300 km), the duration of seismic motion depending on the hypocentral distance, kappa value (κ ~ 0.001 to 0.03 s), and some other parameters. The obtained high estimates of the stress drop, along with rather high Q values, may result in noticeably increased (compared to those that could be expected on average) PGA estimates in seismic hazard assessment in northern Finland.