A magnitude ML 0.5 earthquake occured in region: 4 km E Norcia (PG), on
and geographic coordinates (lat, lon) 42.8120, 13.1410 at 11 km depth.
The earthquake was located by: Bollettino Sismico Italiano INGV.
Search earthquakes: Any within 30 km radius
The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.
Municipality | Region | Distance (km) | Inhabitants | Cumulative Inhabitants |
---|---|---|---|---|
Norcia | PG | 4 | 4957 | 4957 |
Castelsantangelo sul Nera | MC | 9 | 281 | 5238 |
Preci | PG | 11 | 724 | 5962 |
Arquata del Tronto | AP | 14 | 1178 | 7140 |
Visso | MC | 14 | 1107 | 8247 |
Cascia | PG | 15 | 3217 | 11464 |
Ussita | MC | 15 | 444 | 11908 |
Accumoli | RI | 16 | 667 | 12575 |
Montegallo | AP | 16 | 523 | 13098 |
Montemonaco | AP | 18 | 604 | 13702 |
Cerreto di Spoleto | PG | 18 | 1075 | 14777 |
Sellano | PG | 19 | 1079 | 15856 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
ML 0.5 | 2021-08-18 23:45:55 |
42.8122 | 13.1412 | 11 | 2021-12-29 11:12:28 |
Bollettino Sismico Italiano INGV | 95236001 |
Reviewed Rev100 |
ML 0.6 | 2021-08-18 23:45:55 |
42.8047 | 13.1317 | 11 | 2021-08-18 23:57:13 |
Sala Sismica INGV-Roma | 94350761 |
Field | Value |
---|---|
Time (UTC) | 2021-08-18 23:45:55 ± 0.04 |
Latitude | 42.8122 ± 0.0027 |
Longitude | 13.1412 ± 0.0037 |
Depth (km) | 11 ± 0 (from location) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-INGV |
Event type | earthquake |
Origin ID | 95236001 |
Field | Value |
---|---|
Preferred uncertainty description | uncertainty ellipse |
Semi-major axis of confidence ellipse (meter) | 277 |
Semi-minor axis of confidence ellipse (meter) | 231 |
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | 56 |
Circular confidence region, given by single value of horizontal uncertainty (meter) | 280.0 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 50 |
Number of associated phases, regardless of their use for origin computation | 27 |
Number of defining phases | 27 |
RMS of the travel time residuals of the arrivals used for the origin computation (sec) | 0.15 |
Epicentral distance of station closest to the epicenter (degree) | 0.02878 |
Epicentral distance of station farthest from the epicenter (degree) | 0.41908 |
Number of stations at which the event was observed | 14 |
Number of stations from which data was used for origin computation | 14 |
Field | Value |
---|---|
Value | 0.6 |
Uncertainty | 0.3 |
Num. used stations | 8 |
Type of magnitude | ML |
Reference to an origin | 94350761 |
Agency | INGV |
Autore | Sala Sismica INGV-Roma |
Time of creation (UTC) | 2021-08-18 23:57:13 |
Field | Value |
---|---|
Value | 0.5 |
Uncertainty | 0.1 |
Num. used stations | 2 |
Type of magnitude | ML |
Reference to an origin | 95236001 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2021-09-09 13:37:56 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
IV.MOMA.HNZ. | 2021-08-18T23:46:11.11 | 0.6 | undecidable | manual | S | 269 | 46.5201 | 50 | 0.42 | 43 |
IV.CSP1.EHZ. | 2021-08-18T23:46:06.63 | 0.6 | undecidable | manual | S | 9 | 31.4463 | 50 | -0.05 | 48 |
IV.FDMO.HHZ. | 2021-08-18T23:46:05.01 | 0.3 | undecidable | manual | S | 350 | 25.2525 | 50 | -0.02 | 73 |
IV.SMA1.EHZ. | 2021-08-18T23:46:05.44 | 0.6 | undecidable | manual | S | 142 | 25.6521 | 50 | 0.31 | 46 |
IV.CESI.HHZ. | 2021-08-18T23:46:05.97 | 0.6 | undecidable | manual | S | 318 | 28.749 | 50 | 0.01 | 48 |
IV.GAVE.HNZ. | 2021-08-18T23:46:04.56 | 0.6 | undecidable | manual | S | 237 | 24.1536 | 50 | -0.16 | 47 |
IV.LNSS.HHZ. | 2021-08-18T23:46:04.93 | 0.6 | undecidable | manual | S | 200 | 24.6531 | 50 | 0.07 | 48 |
IV.T1299.EHZ. | 2021-08-18T23:46:04.46 | 0.6 | undecidable | manual | S | 150 | 22.8549 | 50 | 0.08 | 48 |
IV.TERO.HHZ. | 2021-08-18T23:46:04.06 | 0.6 | undecidable | manual | P | 119 | 43.2234 | 50 | 0.19 | 45 |
IV.MOMA.HNZ. | 2021-08-18T23:46:04.50 | 0.1 | undecidable | manual | P | 269 | 46.5201 | 50 | 0.11 | 92 |
IT.MTCL.HGZ. | 2021-08-18T23:46:04.22 | 0.6 | undecidable | manual | S | 330 | 23.2545 | 50 | -0.26 | 46 |
IV.MMO1.EHZ. | 2021-08-18T23:46:03.13 | 0.3 | undecidable | manual | S | 57 | 17.9709 | 121 | 0.09 | 73 |
IV.MTRA.HNZ. | 2021-08-18T23:46:03.62 | 0.6 | undecidable | manual | S | 106 | 21.6672 | 50 | -0.46 | 45 |
IV.CSP1.EHZ. | 2021-08-18T23:46:02.26 | 0.6 | positive | manual | P | 9 | 31.4463 | 50 | 0.19 | 46 |
IV.MC2.EHZ. | 2021-08-18T23:46:01.49 | 0.3 | undecidable | manual | S | 19 | 11.6772 | 133 | 0.19 | 72 |
IV.SMA1.EHZ. | 2021-08-18T23:46:01.13 | 0.3 | undecidable | manual | P | 142 | 25.6521 | 50 | -0.04 | 72 |
IV.CESI.HHZ. | 2021-08-18T23:46:01.64 | 0.1 | undecidable | manual | P | 318 | 28.749 | 50 | -0.01 | 97 |
IV.FDMO.HHZ. | 2021-08-18T23:46:01.10 | 0.3 | undecidable | manual | P | 350 | 25.2525 | 50 | -0.02 | 73 |
IV.MTRA.HNZ. | 2021-08-18T23:46:00.48 | 0.1 | undecidable | manual | P | 106 | 21.6672 | 50 | -0.09 | 96 |
IT.MTCL.HGZ. | 2021-08-18T23:46:00.72 | 0.1 | undecidable | manual | P | 330 | 23.2545 | 50 | -0.08 | 96 |
IV.GAVE.HNZ. | 2021-08-18T23:46:00.97 | 0.1 | undecidable | manual | P | 237 | 24.1536 | 50 | 0.03 | 97 |
IV.LNSS.HHZ. | 2021-08-18T23:46:00.87 | 0.1 | undecidable | manual | P | 200 | 24.6531 | 50 | -0.15 | 95 |
IV.T1299.EHZ. | 2021-08-18T23:46:00.75 | 0.1 | undecidable | manual | P | 150 | 22.8549 | 50 | 0.01 | 98 |
IV.MC2.EHZ. | 2021-08-18T23:45:59.16 | 0.3 | undecidable | manual | P | 19 | 11.6772 | 133 | 0.19 | 72 |
IV.MMO1.EHZ. | 2021-08-18T23:45:59.96 | 0.3 | undecidable | manual | P | 57 | 17.9709 | 121 | -0.01 | 74 |
IV.NRCA.HHZ. | 2021-08-18T23:45:59.31 | 0.3 | undecidable | manual | S | 318 | 3.1968 | 163 | -0.38 | 70 |
IV.NRCA.HHZ. | 2021-08-18T23:45:58.09 | 0.1 | undecidable | manual | P | 318 | 3.1968 | 163 | 0.05 | 100 |
SCNL | mag | Generic_amplitude | Period | Type | Category | Unit | Time_window_reference |
---|---|---|---|---|---|---|---|
IV.NRCA.HHE. | ML:0.6 | 0.0000622 | 0.08 | AML | other | m | 2021-08-18T23:45:59.85 |
IV.NRCA.HHN. | ML:0.5 | 0.000049250000000000004 | 1.1 | AML | other | m | 2021-08-18T23:46:00.94 |