A magnitude ML 0.5 earthquake occured in region: 8 km E Norcia (PG), on
and geographic coordinates (lat, lon) 42.7890, 13.1950 at 11 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 | 8 | 4957 | 4957 |
Arquata del Tronto | AP | 9 | 1178 | 6135 |
Accumoli | RI | 11 | 667 | 6802 |
Castelsantangelo sul Nera | MC | 12 | 281 | 7083 |
Montegallo | AP | 13 | 523 | 7606 |
Preci | PG | 16 | 724 | 8330 |
Montemonaco | AP | 16 | 604 | 8934 |
Cascia | PG | 17 | 3217 | 12151 |
Acquasanta Terme | AP | 18 | 2916 | 15067 |
Ussita | MC | 18 | 444 | 15511 |
Visso | MC | 18 | 1107 | 16618 |
Cittareale | RI | 19 | 482 | 17100 |
Amatrice | RI | 19 | 2657 | 19757 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Reviewed Rev100 |
ML 0.5 | 2021-08-11 20:16:59 |
42.7893 | 13.1953 | 11 | 2021-08-11 20:30:02 |
Sala Sismica INGV-Roma | 93980431 |
Field | Value |
---|---|
Time (UTC) | 2021-08-11 20:16:59 ± 0.04 |
Latitude | 42.7893 ± 0.0018 |
Longitude | 13.1953 ± 0.0037 |
Depth (km) | 11 ± 0 (from location) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 100 -> SURVEY-INGV |
Event type | earthquake |
Origin ID | 93980431 |
Field | Value |
---|---|
Preferred uncertainty description | uncertainty ellipse |
Semi-major axis of confidence ellipse (meter) | 304 |
Semi-minor axis of confidence ellipse (meter) | 205 |
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | 266 |
Circular confidence region, given by single value of horizontal uncertainty (meter) | 300.0 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 96 |
Number of associated phases, regardless of their use for origin computation | 20 |
Number of defining phases | 19 |
RMS of the travel time residuals of the arrivals used for the origin computation (sec) | 0.13 |
Epicentral distance of station closest to the epicenter (degree) | 0.00000 |
Epicentral distance of station farthest from the epicenter (degree) | 0.34354 |
Number of stations at which the event was observed | 11 |
Number of stations from which data was used for origin computation | 10 |
Field | Value |
---|---|
Value | 0.5 |
Uncertainty | 0.5 |
Num. used stations | 8 |
Type of magnitude | ML |
Reference to an origin | 93980431 |
Agency | INGV |
Autore | Sala Sismica INGV-Roma |
Time of creation (UTC) | 2021-08-11 20:30:02 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
IV.CSP1.EHZ. | 2021-08-11T20:17:11.39 | 0.3 | undecidable | manual | S | 1 | 33.5442 | 91 | 0.06 | 97 |
IV.FDMO.HHZ. | 2021-08-11T20:17:09.83 | 0.3 | undecidable | manual | S | 342 | 28.749 | 91 | -0.22 | 93 |
IT.MTCL.HGZ. | 2021-08-11T20:17:09.24 | 3.0 | undecidable | manual | S | -0.19 | 0 | |||
IV.LNSS.HHZ. | 2021-08-11T20:17:08.83 | 0.3 | undecidable | manual | S | 211 | 24.2535 | 91 | -0.02 | 98 |
IV.SMA1.EHZ. | 2021-08-11T20:17:07.91 | 0.3 | undecidable | manual | S | 147 | 20.9679 | 92 | -0.07 | 98 |
IV.TERO.HHZ. | 2021-08-11T20:17:07.11 | 0.3 | undecidable | manual | P | 119 | 38.1285 | 91 | -0.09 | 95 |
IV.T1299.HNZ. | 2021-08-11T20:17:07.52 | 0.3 | undecidable | manual | S | 158 | 18.6702 | 93 | 0.18 | 97 |
IV.MMO1.EHZ. | 2021-08-11T20:17:06.61 | 0.3 | undecidable | manual | S | 41 | 16.1727 | 95 | -0.09 | 99 |
IV.MC2.EHZ. | 2021-08-11T20:17:06.27 | 0.3 | undecidable | manual | S | 358 | 13.5753 | 103 | 0.28 | 96 |
IV.MTRA.HNZ. | 2021-08-11T20:17:06.70 | 0.3 | undecidable | manual | S | 102 | 16.7721 | 94 | -0.15 | 98 |
IV.CSP1.EHZ. | 2021-08-11T20:17:06.54 | 0.3 | undecidable | manual | P | 1 | 33.5442 | 91 | 0.04 | 98 |
IV.FDMO.HHZ. | 2021-08-11T20:17:05.72 | 0.3 | undecidable | manual | P | 342 | 28.749 | 91 | -0.05 | 97 |
IV.SMA1.EHZ. | 2021-08-11T20:17:04.43 | 0.3 | undecidable | manual | P | 147 | 20.9679 | 92 | -0.14 | 97 |
IV.LNSS.HHZ. | 2021-08-11T20:17:04.95 | 0.3 | undecidable | manual | P | 211 | 24.2535 | 91 | -0.12 | 96 |
IV.NRCA.HHZ. | 2021-08-11T20:17:04.56 | 0.3 | undecidable | manual | S | 307 | 8.1807 | 131 | -0.18 | 99 |
IV.MMO1.EHZ. | 2021-08-11T20:17:04.05 | 0.3 | undecidable | manual | P | 41 | 16.1727 | 95 | 0.21 | 97 |
IV.T1299.HNZ. | 2021-08-11T20:17:04.19 | 0.3 | undecidable | manual | P | 158 | 18.6702 | 93 | -0.01 | 100 |
IV.MC2.EHZ. | 2021-08-11T20:17:03.50 | 0.3 | undecidable | manual | P | 358 | 13.5753 | 103 | 0.07 | 100 |
IV.MTRA.HNZ. | 2021-08-11T20:17:03.85 | 0.3 | undecidable | manual | P | 102 | 16.7721 | 94 | -0.07 | 99 |
IV.NRCA.HHZ. | 2021-08-11T20:17:02.80 | 0.3 | undecidable | manual | P | 307 | 8.1807 | 131 | 0.09 | 100 |
SCNL | mag | Generic_amplitude | Period | Type | Category | Unit | Time_window_reference |
---|---|---|---|---|---|---|---|
IV.NRCA.HHE. | ML:1.2 | 0.00020050000000000002 | 0.3 | AML | other | m | 2021-08-11T20:17:04.99 |
IV.NRCA.HHN. | ML:1.1 | 0.00017749999999999998 | 0.08 | AML | other | m | 2021-08-11T20:17:05.05 |
IV.SMA1.EHE. | ML:0.3 | 0.000016281105 | 0.1152 | AML | other | m | 2021-08-11T20:17:08.04 |
IV.SMA1.EHN. | ML:0.3 | 0.000015977505 | 0.0896 | AML | other | m | 2021-08-11T20:17:08.09 |
IV.FDMO.HHE. | ML:0.0 | 0.0000064406659999999995 | 0 | AML | other | m | 2021-08-11T20:17:12.42 |
IV.FDMO.HHN. | ML:0.0 | 0.0000068667055 | 0.1408 | AML | other | m | 2021-08-11T20:17:13.50 |
IV.TERO.HHE. | ML:2.1 | 0.0004639594 | 0.3712 | AML | other | m | 2021-08-11T20:17:18.36 |
IV.TERO.HHN. | ML:0.6 | 0.000015414955 | 0.064 | AML | other | m | 2021-08-11T20:17:12.99 |