diff --git a/src/feature/earthquakeNotice.ts b/src/feature/earthquakeNotice.ts
index 9276c60..6965635 100644
--- a/src/feature/earthquakeNotice.ts
+++ b/src/feature/earthquakeNotice.ts
@@ -1,6 +1,7 @@
 import client from "@/lib/client";
 import config from "@/lib/config";
 import initI18n from "@/lib/i18n";
+import Memory from "@/lib/memory";
 import { format } from "date-fns";
 import i18next from "i18next";
 import { readFileSync } from "node:fs";
@@ -39,11 +40,21 @@ if (config.earthquake?.useHistoryData) {
         ? JSON.parse(event.data)
         : event.data;
     } catch (err) {
-      console.error(`メッセージのパースでエラーが発生: ${err}`);
+      console.error(`地震情報メッセージのパースでエラーが発生: ${err}`);
+      return;
+    }
+
+    const mem = Memory.memory;
+    if (mem.processedInfo.includes(message.id) && !config.debug) {
+      console.log("重複した地震情報: ", message.id);
       return;
     }
 
     processMessage(message);
+    if (!config.debug) {
+      mem.processedInfo.concat([message.id]);
+      Memory.memory = mem;
+    }
   });
 }
 
diff --git a/src/lib/memory.ts b/src/lib/memory.ts
index 11a4436..6db4ada 100644
--- a/src/lib/memory.ts
+++ b/src/lib/memory.ts
@@ -9,6 +9,7 @@ class MemoryClass {
   constructor() {
     if (!existsSync(path)) {
       writeFileSync(path, JSON.stringify({
+        processedInfo: [],
         repliedUeuse: [],
         permissions: {},
         userid: "",