What makes an earthquake "significant"?
- 6.320 km NE of Esmeraldas, Ecuador2025-04-25 11:44:55 UTC35.0 km
- 6.221 km SE of Marmara Ereğlisi, Turkey2025-04-23 09:49:10 UTC10.0 km
- 4.56 km N of Willow, Alaska2025-04-23 00:24:51 UTC26.1 km
- 5.126 km SW of Singleton, Australia2025-04-22 16:55:03 UTC10.0 km
- 4.320 km W of Beluga, Alaska2025-04-19 07:18:55 UTC83.3 km
- 6.6southeast Indian Ridge2025-04-16 01:42:59 UTC10.0 km
- 4.04 km SSE of Julian, CA2025-04-14 18:23:42 UTC12.6 km
- 5.25 km S of Julian, CA2025-04-14 17:08:28 UTC14.3 km
- 6.5south of the Fiji Islands2025-04-13 20:03:22 UTC271.0 km
- 5.836 km E of Rasht, Tajikistan2025-04-13 04:24:01 UTC8.0 km
- 5.534 km NNE of Meiktila, Burma (Myanmar)2025-04-13 02:24:57 UTC7.7 km
- 6.9181 km ESE of Kimbe, Papua New Guinea2025-04-04 20:04:38 UTC10.0 km
- 6.9Reykjanes Ridge2025-04-03 14:09:29 UTC10.0 km
- 6.254 km ENE of Nishinoomote, Japan2025-04-02 14:03:57 UTC26.0 km
- 6.3Pacific-Antarctic Ridge2025-04-02 00:29:22 UTC10.0 km
- 7.061 km SSE of Pangai, Tonga2025-03-30 12:18:50 UTC29.0 km
- 6.6central Mid-Atlantic Ridge2025-03-28 17:17:27 UTC12.3 km
- 6.7Burma (Myanmar)2025-03-28 06:32:04 UTC10.0 km
- 7.72025 Mandalay, Burma (Myanmar) Earthquake2025-03-28 06:20:52 UTC10.0 km
- 6.7170 km WSW of Riverton, New Zealand2025-03-25 01:43:11 UTC21.0 km
- 6.2123 km SSE of Burica, Panama2025-03-21 14:50:51 UTC10.0 km
- 3.95 km WNW of Dublin, CA2025-03-18 02:46:33 UTC10.9 km
- 3.910 km NW of Malibu, CA2025-03-17 03:17:21 UTC11.8 km
- 6.534 km NE of Olonkinbyen, Svalbard and Jan Mayen2025-03-10 02:33:14 UTC10.0 km
- 4.110 km NW of Malibu, CA2025-03-09 20:03:20 UTC11.4 km
- 4.52025 Orcas Island, Washington2025-03-03 13:02:37 UTC15.8 km
- 3.82 km ESE of North Hollywood, CA2025-03-03 06:13:45 UTC15.6 km
- 4.826 km SW of Ackerly, Texas2025-02-28 19:33:24 UTC6.8 km
- 5.8102 km NNE of Punta Cana, Dominican Republic2025-02-25 05:48:55 UTC46.0 km
- 3.46 km SSE of Lea Hill, Washington2025-02-22 11:45:29 UTC25.4 km
- 4.828 km W of Squamish, Canada2025-02-21 21:26:32 UTC10.0 km
- 4.81 km NE of Charneca de Caparica, Portugal2025-02-17 13:24:04 UTC10.0 km
- 4.210 km SSE of Nāngloi Jāt, India2025-02-17 00:06:52 UTC10.0 km
- 3.711 km WNW of Malibu, CA2025-02-15 14:30:12 UTC14.2 km
- 3.710 km WNW of Malibu, CA2025-02-15 07:44:05 UTC15.4 km
- 5.053 km NW of Toyah, Texas2025-02-15 05:23:21 UTC6.1 km
- 5.125 km N of Ouezzane, Morocco2025-02-10 22:48:41 UTC29.5 km
- 7.6210 km SSW of George Town, Cayman Islands2025-02-08 23:23:14 UTC14.3 km
- 4.125 km SSW of Susitna, Alaska2025-02-05 08:07:09 UTC5.1 km
- 4.519 km ENE of Falls City, Texas2025-01-30 03:26:38 UTC3.7 km
- 3.89 km SE of York Harbor, Maine2025-01-27 15:22:56 UTC10.6 km
- 6.010 km NE of Yujing, Taiwan2025-01-20 16:17:26 UTC16.0 km
- 2.81 km NNE of Wyndham, Virginia2025-01-14 22:28:51 UTC0.1 km
- 6.815 km SE of Miyazaki, Japan2025-01-13 12:19:32 UTC39.0 km
- 6.218 km SE of Aquila, Mexico2025-01-12 08:32:49 UTC39.0 km
- 5.5Southern Qinghai, China2025-01-08 07:44:22 UTC10.0 km
- 7.12025 Southern Tibetan Plateau Earthquake2025-01-07 01:05:16 UTC10.0 km
- 6.256 km SSE of La Libertad, El Salvador2025-01-05 17:18:45 UTC46.0 km
- 5.752 km N of Āwash, Ethiopia2025-01-04 00:52:21 UTC8.0 km
- 6.184 km NNW of Calama, Chile2025-01-02 20:43:35 UTC99.0 km
- 4.74 km NW of Cobb, CA2025-01-02 02:34:04 UTC1.4 km
What makes an earthquake "significant"?
Events in this list and shown in red on our real-time earthquake map and list are considered “significant events’, and they are determined by a combination of magnitude, number of Did You Feel It responses, and PAGER alert level.
Here is the equation:
mag_significance = magnitude * 100 * (magnitude / 6.5);
pager_significance = red is 2000 : orange is 1000 : yellow is 500 : green is 0;
dyfi_significance = min(num_responses, 1000) * max_cdi / 10;
significance = max(mag_significance, pager_significance) + dyfi_significance;
Any event with a significance > 600 is considered a significant event and appears on the list.