# Earthquakes — Chile, September 2015 (sample)

The eight largest Chilean earthquakes of September 2015 — the M8.3 Illapel megathrust mainshock and its principal aftershock sequence — each with USGS ShakeMap-derived assessment (magnitude, depth, max MMI, peak ground acceleration) and PGA contour polygons.

**Events:** 8  ·  **Date range (UTC):** 2015-09-16 to 2015-09-28

| Event | Start (UTC) |
|---|---|
| Earthquake - 8.3 - 46km W of Illapel, Chile | 2015-09-16T22:54:26Z |
| Earthquake - 6.4 - 58km W of Illapel, Chile | 2015-09-16T22:59:17Z |
| Earthquake - 7.0 - 25km W of Illapel, Chile | 2015-09-16T23:18:42Z |
| Earthquake - 6.4 - 64km NW of Illapel, Chile | 2015-09-17T01:41:09Z |
| 6.5 Earthquake — 54 km WNW of Illapel, Chile | 2015-09-17T03:55:15Z |
| Earthquake - 6.7 - 53km W of Illapel, Chile | 2015-09-17T04:10:31Z |
| Earthquake - 6.6 - 63km WSW of Illapel, Chile | 2015-09-21T17:39:55Z |
| Earthquake - 6.2 - 30km SW of Ovalle, Chile | 2015-09-26T02:51:18Z |

## Files

- `earthquake_chile_2015-09.ndjson` — full enhanced hazard records (authoritative)
- `hazards.csv` — one row per earthquake with flattened ShakeMap assessment
- `pga_contours.csv` — ShakeMap PGA contours (value + WKT geometry) per event

All records are complete DisasterAWARE enhanced-hazard objects; the NDJSON file is the authoritative full-fidelity copy (one JSON object per line), the CSVs are flattened relational views joined on `hazard_uuid`/`uuid`. Coordinates are WGS84 (EPSG:4326); geometry columns are WKT.