Reference

To find authoritative data for the 1969 Alaşehir earthquake, the following sources are recommended:

1. Wikiwand Article on the 1969 Alaşehir Earthquake: This article provides a summary of the earthquake, including its magnitude, location, and impact. You can find the article here.

2. United States Geological Survey (USGS) Publications Warehouse: This PDF document includes instrumental data from seismological observatories relevant to the 1969 earthquakes. The specific report can be accessed here.

3. International Seismological Centre: While the specific event isn’t directly listed in the provided search results, they generally hold authoritative data on earthquake events and could act as a valuable resource.

4. PDF Report on the Rift System of Western Turkey: This report details seismic activity in the region, including specific mention of the Alaşehir earthquake, and can be accessed here.

5. EERI Special Earthquake Report: This document includes detailed reports on various earthquakes, including the one that occurred in Alaşehir. It can be retrieved here.

These sources should provide comprehensive and authoritative data on the 1969 Alaşehir earthquake.