  Sunquakes are one of the more distinct secondary phenomena related to solar
flares, where energy deposition in the lower layers of the Sun's atmosphere
excites acoustic waves easily visible in Helioseismic and Magnetic Imager (HMI)
dopplergrams. We explore two possible sources of sunquakes in the context of
the electron beam hypothesis: an instantaneous transfer of momentum and a
gradual applied force due to flare eruption. We model the sunquake excitation
and compare with five observed sunquake events using a cross-correlation
analysis. We find that at least half the events studied are consistent with the
electron beam hypothesis and estimate the energy required to excite the
sunquakes to be within the range determined by previous studies.
