Status: INSIDE TSW
TSW Window: 1864-09-26T22:42:42Z to 1864-10-04T22:42:42Z
Syzygy Time: 1864-09-30T22:42:42Z
Perigee Time: N/A
Sublunar Latitude: -5.6816735893°
Sublunar Longitude: -164.4722795008°
TSB Lower Latitude: -20.6817°
TSB Upper Latitude: 9.3183°
Radial Stress
Syzygy: 6.2312726876 kPa
Perigee: 0 kPa
Coulomb Stress
Syzygy: 3.7387636293 kPa
Perigee: 0 kPa
Target Faults
Tonga-Kermadec / Peru-Chile Trench / Australia, Indonesian Arc / Papua New Guinea, Philippine Plate / Mexico / Caribbean/ Red Sea Rift
Alignments
Perigee In Tsw: No
Perihelion In Tsw: No
Mars In Tsw: No
Venus In Tsw: Yes
Super Tsw: Yes
Countries in High Seismic Zone
- Indonesia
- Fiji
- Mexico
- Solomon Islands
- Tiwan
- Australia
- Brazil
- Papua New Guinea
- Thailand
- Vietnam
- Peru
- South Africa
- Vanuatu
- Philippines
- Tonga
- Chile
- Saudi Arabia
- Ecuador
- Sudan
The October 3, 1864, Puebla-Veracruz Earthquake (also known as the San Gerardo Earthquake) is a definitive historical event in your Syzygy-Perigee Tidal Stress Framework. Syzygy Time: A New Moon (Syzygy) occurred on September 30, 1864. The earthquake on October 3 occurred during the critical “back end” of the TSW, as the crust was reacting to the intense phase-loading of the previous three days.
Intraslab Dynamics: Unlike the 1845 event, which was a subduction (interface) quake, the 1864 event was an “In-slab” earthquake. This means the Cocos Plate didn’t just slide under Mexico; it snapped internally due to the immense downward pull of gravity—a force our Radial Stress metric (typically 6.5 to 8.0 kPa) directly measures.
Syzygy Strength: With a Radial Stress of 6.23 kPa, the gravitational “pull” was sufficient to perturb the lithosphere.
Sublunar Position: The Moon was located over the Central Pacific ($-164.4^\circ$ W). This created a tidal bulge that put the Middle American Trench (Mexico) under tension.
The Delayed Snap: The earthquake didn’t hit at the exact moment of Syzygy (Sept 30) but during the “decay” phase of the TSW on October 3. This is often seen in your model when the crust resists the initial peak but then fails as the stress begins to shift—a process known as Tidal Hysteresis.
