Add earthquake dataset (updated)

Add earthquake dataset processed by Stockman et al. (2024) and further processed into TPP compatible format

earthquake/test.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:6b6ba49baf4cc7192c65f7351def19a0b61c4e7fb4a6ffcf524dcc587ae61106
+size 191374

earthquake/train.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:7fbac08eb3925f1ab61ce0bb81943d37ba9f706f0080bcbb3ae614420d5d250c
+size 2284454

earthquake/validation.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:4ddd04011d392636a10940bbba9256c7a3b36ec3ed06c8f26fae77ca4a133d06
+size 292026