  We consider the production and deposition on Earth of isotopes with
half-lives in the range 10$^{5}$ to 10$^{8}$ years that might provide
signatures of nearby stellar explosions, extending previous analyses of
Core-Collapse Supernovae (CCSNe) to include Electron-Capture Supernovae
(ECSNe), Super-Asymptotic Giant Branch (SAGBs) stars, Thermonuclear/Type Ia
Supernovae (TNSNe), and Kilonovae/Neutron Star Mergers (KNe). We revisit
previous estimates of the $^{60}$Fe and $^{26}$Al signatures, and extend these
estimates to include $^{244}$Pu and $^{53}$Mn. We discuss interpretations of
the $^{60}$Fe signals in terrestrial and lunar reservoirs in terms of a nearby
stellar ejection ~2.2 Myr ago, showing that (i) the $^{60}$Fe yield rules out
the TNSN and KN interpretations, (ii) the $^{60}$Fe signals highly constrain a
SAGB interpretation but do not completely them rule out, (iii) are consistent
with a CCSN origin, and (iv) are highly compatible with an ECSN interpretation.
Future measurements could resolve the radioisotope deposition over time, and we
use the Sedov blast wave solution to illustrate possible time-resolved
profiles. Measuring such profiles would independently probe the blast
properties including distance, and would provide additional constraints the
nature of the explosion.
