{"groups":[{"group_name":"No Significant Alerts","group_summary":"No red, orange, or yellow alerts were issued. One green alert and 901 events without alerts indicate low operational urgency overall."},{"group_name":"Northern Mariana Cluster","group_summary":"MP produced the strongest activity: M4.9, M4.6, and M4.5 events near Saipan and San Jose Village. No alerts or ShakeMaps were reported."},{"group_name":"Alaska Activity","group_summary":"AK was a leading activity region, including M4.3 and M4.2 events near Akutan and False Pass, plus a highly significant M3.9 event near Hope."},{"group_name":"Mostly Microquakes","group_summary":"Of 902 events, 836 were micro and 58 minor. Only eight were light; no moderate-or-greater earthquakes occurred."},{"group_name":"Broad Regional Activity","group_summary":"Activity concentrated across AK, CA, TX, HI, and WA, with Alaska standing out among the highest-magnitude and highest-significance events."},{"group_name":"Limited ShakeMap Coverage","group_summary":"Only 13 events had USGS ShakeMaps, about 1.4% of the total. Coverage was present for notable Alaska events but absent for top MP events."}],"briefing_sections":[{"title":"Seismic Pattern","facts":[{"label":"Largest event","value":"M4.9 - MP - 167 km SE of San Jose Village, Northern Mariana Islands","detail":null,"detail_display":null,"tone":"warning","item_ref":{"family":"earthquakes","id":"us6000tmra","kind":"earthquake_event"}},{"label":"Peak significance","value":"M3.9 - AK - 1 km WSW of Hope, Alaska","detail":"significance 601","detail_display":null,"tone":"warning","item_ref":{"family":"earthquakes","id":"aka2026qoynpe","kind":"earthquake_event"}}]},{"title":"Operational Context","facts":[{"label":"ShakeMap coverage","value":"13 of 902","detail":"1.4%","detail_display":null,"tone":"default","item_ref":null},{"label":"Public alerts","value":"None","detail":null,"detail_display":null,"tone":"default","item_ref":null},{"label":"Top regions","value":"AK, CA, TX, HI +1","detail":null,"detail_display":null,"tone":"default","item_ref":null},{"label":"Latest event","value":"Aug 22, 2026, 4:42 PM UTC","detail":null,"detail_display":null,"tone":"default","item_ref":null},{"label":"Latest update","value":"Aug 22, 2026, 5:00 PM UTC","detail":null,"detail_display":null,"tone":"default","item_ref":null}]},{"title":"Leading Events","facts":[{"label":"By magnitude","value":"M4.9 - MP - 167 km SE of San Jose Village, Northern Mariana Islands, M4.6 - MP - 76 km SSW of San Jose Village, Northern Mariana Islands, M4.5 - MP - 85 km N of Saipan, Northern Mariana Islands +2","detail":null,"detail_display":null,"tone":"default","item_ref":null}]}],"stats":{"event_count":902,"with_shakemap_count":13,"with_shakemap_ratio":0.0144,"magnitude_class_counts":{"micro":836,"minor":58,"light":8,"moderate":0,"strong":0,"major":0,"great":0,"unknown":0},"alert_counts":{"red":0,"orange":0,"yellow":0,"green":1,"none":901,"other":0},"top_regions":["AK","CA","TX","HI","WA"],"max_magnitude":4.9,"max_significance":601,"latest_event_time":"2026-08-22T16:42:15.210000Z","latest_update_time":"2026-08-22T17:00:05.788000Z","top_events_by_magnitude":[{"event_id":"us6000tmra","mag":4.9,"mag_class":"light","sig":370,"alert":"none","place":"167 km SE of San Jose Village, Northern Mariana Islands","country_code":"MP","primary_state_abbr":"MP","time_utc":"2026-08-22T05:47:07.443000Z","updated_utc":"2026-08-22T07:57:53.792000Z","has_usgs_shakemap":false,"has_shakemap_overlays":false},{"event_id":"us6000tmrq","mag":4.6,"mag_class":"light","sig":326,"alert":"none","place":"76 km SSW of San Jose Village, Northern Mariana Islands","country_code":"MP","primary_state_abbr":"MP","time_utc":"2026-08-22T07:43:51.050000Z","updated_utc":"2026-08-22T08:11:31.040000Z","has_usgs_shakemap":false,"has_shakemap_overlays":false},{"event_id":"us6000tmb4","mag":4.5,"mag_class":"light","sig":312,"alert":"none","place":"85 km N of Saipan, Northern Mariana Islands","country_code":"MP","primary_state_abbr":"MP","time_utc":"2026-08-20T21:57:40.312000Z","updated_utc":"2026-08-21T01:49:08.040000Z","has_usgs_shakemap":false,"has_shakemap_overlays":false},{"event_id":"us6000tmcf","mag":4.3,"mag_class":"light","sig":284,"alert":"none","place":"73 km SSE of Akutan, Alaska","country_code":"US","primary_state_abbr":"AK","time_utc":"2026-08-21T01:11:50.896000Z","updated_utc":"2026-08-21T05:05:35.928000Z","has_usgs_shakemap":true,"has_shakemap_overlays":true},{"event_id":"us6000tmd6","mag":4.2,"mag_class":"light","sig":271,"alert":"none","place":"100 km S of False Pass, Alaska","country_code":"US","primary_state_abbr":"AK","time_utc":"2026-08-21T03:14:24.017000Z","updated_utc":"2026-08-21T05:10:34.401000Z","has_usgs_shakemap":true,"has_shakemap_overlays":true}],"top_events_by_significance":[{"event_id":"aka2026qoynpe","mag":3.9,"mag_class":"minor","sig":601,"alert":"none","place":"1 km WSW of Hope, Alaska","country_code":"US","primary_state_abbr":"AK","time_utc":"2026-08-22T07:42:40.939000Z","updated_utc":"2026-08-22T17:00:05.788000Z","has_usgs_shakemap":true,"has_shakemap_overlays":true},{"event_id":"us6000tmra","mag":4.9,"mag_class":"light","sig":370,"alert":"none","place":"167 km SE of San Jose Village, Northern Mariana Islands","country_code":"MP","primary_state_abbr":"MP","time_utc":"2026-08-22T05:47:07.443000Z","updated_utc":"2026-08-22T07:57:53.792000Z","has_usgs_shakemap":false,"has_shakemap_overlays":false},{"event_id":"us6000tmrq","mag":4.6,"mag_class":"light","sig":326,"alert":"none","place":"76 km SSW of San Jose Village, Northern Mariana Islands","country_code":"MP","primary_state_abbr":"MP","time_utc":"2026-08-22T07:43:51.050000Z","updated_utc":"2026-08-22T08:11:31.040000Z","has_usgs_shakemap":false,"has_shakemap_overlays":false},{"event_id":"us6000tmb4","mag":4.5,"mag_class":"light","sig":312,"alert":"none","place":"85 km N of Saipan, Northern Mariana Islands","country_code":"MP","primary_state_abbr":"MP","time_utc":"2026-08-20T21:57:40.312000Z","updated_utc":"2026-08-21T01:49:08.040000Z","has_usgs_shakemap":false,"has_shakemap_overlays":false},{"event_id":"us6000tmcf","mag":4.3,"mag_class":"light","sig":284,"alert":"none","place":"73 km SSE of Akutan, Alaska","country_code":"US","primary_state_abbr":"AK","time_utc":"2026-08-21T01:11:50.896000Z","updated_utc":"2026-08-21T05:05:35.928000Z","has_usgs_shakemap":true,"has_shakemap_overlays":true}]},"created_at":"2026-08-22T17:03:21.529377Z","model":"gpt-5.6-luna","usage":{"input_tokens":1933,"input_tokens_details":{"cache_write_tokens":0,"cached_tokens":0},"output_tokens":317,"output_tokens_details":{"reasoning_tokens":41},"total_tokens":2250},"message":null,"country_code":"US","state_abbr":null,"view":"earthquakes","tiles_version":null,"tiles_updated_at":null}