The 1886 Great Althon Earthquake was the latest noteworthy earthquake in Althon, registering a moment magnitude of 8.7, causing soil liquefaction. The earthquake affected Puyonia, Purinpu, and Raffineway were affected by what felt like a 6.6.
| UTC time | Unknown |
|---|---|
| Roblox Seismological Centre event | Unknown |
| Local date | June 12th, 1886 |
| Local time | Unknown |
| Depth | Unknown |
| Epicenter | Althon |
| Fault | Soil Liquefaction |
| Areas affected | Puyonia |
| Tsunami | None |
| Casualties | 0 confirmed dead, 0 injured |
| Required Information | |
| Downdip rupture width in miles | 35.74 |
| Rupture area in square miles | 10,536 |
| Surface rupture length in miles | 359.8 |
| Subsurface rupture length in miles | 316.7 |
| Average displacement in feet | 51.39 |
| Fault slip rate in inches per year | 0.5709 |
| Chikorita Magnitude | 8.7 Mchikorita (Great) |