A magnitude ML 0.8 earthquake occured in region: 4 km E Norcia (PG), on
and geographic coordinates (lat, lon) 42.7870, 13.1430 at 12 km depth.
The earthquake was located by: Sala Sismica INGV-Roma.
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 | 12 | 281 | 5238 |
Arquata del Tronto | AP | 13 | 1178 | 6416 |
Cascia | PG | 13 | 3217 | 9633 |
Preci | PG | 13 | 724 | 10357 |
Accumoli | RI | 13 | 667 | 11024 |
Visso | MC | 17 | 1107 | 12131 |
Montegallo | AP | 17 | 523 | 12654 |
Ussita | MC | 18 | 444 | 13098 |
Cerreto di Spoleto | PG | 19 | 1075 | 14173 |
Poggiodomo | PG | 19 | 117 | 14290 |
Cittareale | RI | 19 | 482 | 14772 |
Montemonaco | AP | 20 | 604 | 15376 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Reviewed Rev100 |
ML 0.8 | 2021-08-31 01:30:54 |
42.7868 | 13.1428 | 12 | 2021-08-31 01:38:18 |
Sala Sismica INGV-Roma | 94842631 |
Field | Value |
---|---|
Time (UTC) | 2021-08-31 01:30:54 ± 0.09 |
Latitude | 42.7868 ± 0.0054 |
Longitude | 13.1428 ± 0.0061 |
Depth (km) | 12 ± 1 (from location) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 100 -> SURVEY-INGV |
Event type | earthquake |
Origin ID | 94842631 |
Field | Value |
---|---|
Preferred uncertainty description | uncertainty ellipse |
Semi-major axis of confidence ellipse (meter) | 552 |
Semi-minor axis of confidence ellipse (meter) | 281 |
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | 149 |
Circular confidence region, given by single value of horizontal uncertainty (meter) | 550.0 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 93 |
Number of associated phases, regardless of their use for origin computation | 14 |
Number of defining phases | 14 |
RMS of the travel time residuals of the arrivals used for the origin computation (sec) | 0.19 |
Epicentral distance of station closest to the epicenter (degree) | 0.05126 |
Epicentral distance of station farthest from the epicenter (degree) | 0.30847 |
Number of stations at which the event was observed | 8 |
Number of stations from which data was used for origin computation | 8 |
Field | Value |
---|---|
Value | 0.8 |
Uncertainty | 0.3 |
Num. used stations | 4 |
Type of magnitude | ML |
Reference to an origin | 94842631 |
Agency | INGV |
Autore | Sala Sismica INGV-Roma |
Time of creation (UTC) | 2021-08-31 01:38:18 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
IV.GAVE.EHZ. | 2021-08-31T01:31:03.39 | 0.6 | undecidable | manual | S | 243 | 22.8549 | 97 | -0.08 | 47 |
IV.LNSS.HHZ. | 2021-08-31T01:31:03.90 | 0.6 | undecidable | manual | S | 202 | 22.0668 | 98 | 0.63 | 43 |
IV.SMA1.EHZ. | 2021-08-31T01:31:03.62 | 0.6 | undecidable | manual | S | 138 | 23.3544 | 97 | 0 | 48 |
IV.MMO1.EHZ. | 2021-08-31T01:31:02.66 | 0.6 | undecidable | manual | S | 50 | 19.4694 | 101 | 0.07 | 48 |
IV.MC2.EHZ. | 2021-08-31T01:31:01.69 | 0.6 | undecidable | manual | S | 15 | 14.2746 | 112 | 0.43 | 45 |
IV.CSP1.EHZ. | 2021-08-31T01:31:01.32 | 1.0 | undecidable | manual | P | 8 | 34.2435 | 93 | -0.28 | 23 |
IV.FDMO.HHZ. | 2021-08-31T01:31:00.47 | 1.0 | negative | manual | P | 351 | 28.0497 | 95 | -0.18 | 23 |
IV.LNSS.HHZ. | 2021-08-31T01:30:59.56 | 0.6 | undecidable | manual | P | 202 | 22.0668 | 98 | -0.17 | 46 |
IV.SMA1.EHZ. | 2021-08-31T01:30:59.65 | 1.0 | positive | manual | P | 138 | 23.3544 | 97 | -0.29 | 23 |
IV.GAVE.EHZ. | 2021-08-31T01:30:59.89 | 1.0 | positive | manual | P | 243 | 22.8549 | 97 | 0.04 | 24 |
IV.MMO1.EHZ. | 2021-08-31T01:30:59.18 | 0.6 | undecidable | manual | P | 50 | 19.4694 | 101 | -0.16 | 48 |
IV.NRCA.HHZ. | 2021-08-31T01:30:59.29 | 0.6 | undecidable | manual | S | 336 | 5.6943 | 148 | -0.21 | 48 |
IV.MC2.EHZ. | 2021-08-31T01:30:58.59 | 0.6 | undecidable | manual | P | 15 | 14.2746 | 112 | 0.01 | 49 |
IV.NRCA.HHZ. | 2021-08-31T01:30:57.53 | 0.1 | positive | manual | P | 336 | 5.6943 | 148 | -0.03 | 100 |
SCNL | mag | Generic_amplitude | Period | Type | Category | Unit | Time_window_reference |
---|---|---|---|---|---|---|---|
IV.NRCA.HHN. | ML:1.1 | 0.00017449999999999999 | 0.08 | AML | other | m | 2021-08-31T01:30:59.29 |
IV.NRCA.HHE. | ML:1.0 | 0.00014450000000000002 | 0.12 | AML | other | m | 2021-08-31T01:30:59.30 |
IV.FDMO.HHE. | ML:0.6 | 0.0000189 | 0.44 | AML | other | m | 2021-08-31T01:31:05.35 |
IV.FDMO.HHN. | ML:0.6 | 0.0000195 | 0.46 | AML | other | m | 2021-08-31T01:31:09.23 |