《明史·志·卷四》
弘治六年六月丁卯日，石州昊城驿两次无云而打雷。
弘治六年六月丁卯，石州吴城驿无云而震者再。
On Ding Mao day in June of the 6th year of Hongzhi, there was thunder twice in Haocheng Post of Shizhou without clouds.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 弘治六年六月丁卯，石州吴城驿无云而震者再。 [/INST] On Ding Mao day in June of the 6th year of Hongzhi, there was thunder twice in Haocheng Post of Shizhou without clouds.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 弘治六年六月丁卯，石州吴城驿无云而震者再。
user
On Ding Mao day in June of the 6th year of Hongzhi, there was thunder twice in Haocheng Post of Shizhou without clouds.
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