Here are a few options for the description of the WordPress post_tag “地震規模” (Earthquake Magnitude) in Traditional Chinese, varying in length and focus:

**Option 1 (Concise & General):**

> 描述地震的震級大小。 (Describes the magnitude of an earthquake.)

**Option 2 (Slightly More Detailed):**

> 標記文章中關於地震規模（如里氏震級、矩震級）的資訊。 (Tags articles about earthquake magnitudes, such as the Richter scale and the moment magnitude scale.)

**Option 3 (Focus on its Purpose):**

> 使用這個標籤來歸類、索引與地震級別相關的文章，方便您查看不同震級的地震資料與報導。 (Use this tag to categorize and index articles related to earthquake magnitudes, making it easier for you to view data and reports on earthquakes of different magnitudes.)

**Option 4 (Adding a Keyword):**

> 了解不同地震的大小，包括震級、震央、烈度等等。 (Learn about the different sizes of earthquakes, including magnitude, epicenter, intensity, etc.)

**Which option is best for you depends on your needs, but I recommend Option 2 or 3 for clarity.** They provide a good balance of information and relevance to the post’s content. Remember to stay consistent with your overall tagging strategy. Good luck!