---
title: "Post Seismic Magnitude"
method: POST
path: "/api/v1/cross/post-seismic/magnitude"
tags: ["Post-Seismic Normal Mode Tracker"]
---

# Post Seismic Magnitude

`POST /api/v1/cross/post-seismic/magnitude`

## Request

- Base URL: `https://www.deepmapai.com`
- URL: `https://www.deepmapai.com/api/v1/cross/post-seismic/magnitude`
- Auth: none declared

Compute independent Mw from normal modes for a specific earthquake.

Uses 0S0 and 0S2 mode amplitudes from stacked Raspberry Shake
spectra to estimate seismic moment, providing an independent
magnitude within ~30 minutes of the event.

**Pricing:** Included in subscription tiers (legacy list price: GET /api/v1/billing/pricing).

## Query parameters

- `x_api_key` string, nullable

## Request body

- BodyPostSeismicMagnitudeApiV1CrossPostSeismicMagnitudePost
  - `event_id` string, nullable: USGS event ID (optional)
  - `lat` number, required: Event latitude
  - `lon` number, required: Event longitude
  - `depth_km` number: Event depth in km
  - `usgs_mw` number, nullable: USGS Mw if known

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/deepmapai/apis/deepmap-ai.md) · [All operations](https://skmtc.dev/deepmapai/apis/deepmap-ai/llms.txt) · [OpenAPI document](https://skmtc.dev/deepmapai/apis/deepmap-ai/revisions/dab995d977d0?raw)