A magnitude ML 0.9 earthquake occured in region: 3 km SE Arquata del Tronto (AP), on
and geographic coordinates (lat, lon) 42.7450, 13.3120 at 20 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 |
---|---|---|---|---|
Arquata del Tronto | AP | 3 | 1178 | 1178 |
Accumoli | RI | 8 | 667 | 1845 |
Acquasanta Terme | AP | 9 | 2916 | 4761 |
Montegallo | AP | 11 | 523 | 5284 |
Amatrice | RI | 13 | 2657 | 7941 |
Valle Castellana | TE | 15 | 977 | 8918 |
Montemonaco | AP | 17 | 604 | 9522 |
Norcia | PG | 19 | 4957 | 14479 |
Cittareale | RI | 19 | 482 | 14961 |
Roccafluvione | AP | 19 | 2010 | 16971 |
Rocca Santa Maria | TE | 19 | 537 | 17508 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
ML 0.9 | 2021-04-21 11:19:01 |
42.7453 | 13.312 | 20 | 2021-07-12 16:55:11 |
Bollettino Sismico Italiano INGV | 90229451 |
Reviewed Rev100 |
ML 1.1 | 2021-04-21 11:19:01 |
42.7463 | 13.3088 | 19 | 2021-04-21 11:28:59 |
Sala Sismica INGV-Roma | 89327201 |
Field | Value |
---|---|
Time (UTC) | 2021-04-21 11:19:01 ± 0.13 |
Latitude | 42.7453 ± 0.0045 |
Longitude | 13.3120 ± 0.0061 |
Depth (km) | 20 ± 1 (from location) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-INGV |
Event type | earthquake |
Origin ID | 90229451 |
Field | Value |
---|---|
Preferred uncertainty description | uncertainty ellipse |
Semi-major axis of confidence ellipse (meter) | 570 |
Semi-minor axis of confidence ellipse (meter) | 263 |
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | 238 |
Circular confidence region, given by single value of horizontal uncertainty (meter) | 570.0 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 104 |
Number of associated phases, regardless of their use for origin computation | 15 |
Number of defining phases | 15 |
RMS of the travel time residuals of the arrivals used for the origin computation (sec) | 0.14 |
Epicentral distance of station closest to the epicenter (degree) | 0.06295 |
Epicentral distance of station farthest from the epicenter (degree) | 0.24731 |
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 | 0.9 |
Uncertainty | 0.4 |
Num. used stations | 6 |
Type of magnitude | ML |
Reference to an origin | 90229451 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2021-05-18 12:36:05 |
Field | Value |
---|---|
Value | 1.1 |
Uncertainty | 0.2 |
Num. used stations | 4 |
Type of magnitude | ML |
Reference to an origin | 89327201 |
Agency | INGV |
Autore | Sala Sismica INGV-Roma |
Time of creation (UTC) | 2021-04-21 11:28:59 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
IV.TERO.HHZ. | 2021-04-21T11:19:11.74 | 0.3 | undecidable | manual | S | 120 | 27.4503 | 118 | -0.04 | 72 |
IV.MC2.EHZ. | 2021-04-21T11:19:10.38 | 0.3 | undecidable | manual | S | 332 | 20.9679 | 127 | 0.06 | 73 |
IV.MMO1.EHZ. | 2021-04-21T11:19:09.69 | 0.6 | undecidable | manual | S | 4 | 17.1717 | 133 | 0.16 | 48 |
IV.NRCA.HHZ. | 2021-04-21T11:19:09.68 | 0.6 | undecidable | manual | S | 301 | 18.87 | 130 | -0.19 | 48 |
IV.T1299.HNN. | 2021-04-21T11:19:08.95 | 0.3 | undecidable | manual | S | 191 | 12.5763 | 143 | 0.23 | 71 |
IV.SMA1.EHZ. | 2021-04-21T11:19:08.57 | 0.3 | undecidable | manual | S | 172 | 12.876 | 142 | -0.2 | 72 |
IV.TERO.HHZ. | 2021-04-21T11:19:07.43 | 0.3 | undecidable | manual | P | 120 | 27.4503 | 118 | 0.06 | 72 |
IV.MTRA.EHE. | 2021-04-21T11:19:07.93 | 0.3 | undecidable | manual | S | 80 | 6.993 | 158 | -0.06 | 74 |
IV.RM33.EHZ. | 2021-04-21T11:19:07.28 | 0.6 | positive | manual | P | 197 | 27.3504 | 118 | -0.09 | 48 |
IV.NRCA.HHZ. | 2021-04-21T11:19:06.23 | 0.1 | positive | manual | P | 301 | 18.87 | 130 | -0.04 | 98 |
IV.MC2.EHZ. | 2021-04-21T11:19:06.76 | 1.0 | negative | manual | P | 332 | 20.9679 | 127 | 0.23 | 23 |
IV.T1299.HNN. | 2021-04-21T11:19:05.68 | 0.1 | undecidable | manual | P | 191 | 12.5763 | 143 | 0.07 | 98 |
IV.MMO1.EHZ. | 2021-04-21T11:19:05.47 | 1.0 | undecidable | manual | P | 4 | 17.1717 | 133 | -0.61 | 21 |
IV.MTRA.EHE. | 2021-04-21T11:19:05.21 | 0.1 | undecidable | manual | P | 80 | 6.993 | 158 | 0.03 | 100 |
IV.SMA1.EHZ. | 2021-04-21T11:19:05.65 | 0.1 | undecidable | manual | P | 172 | 12.876 | 142 | 0.01 | 99 |
SCNL | mag | Generic_amplitude | Period | Type | Category | Unit | Time_window_reference |
---|---|---|---|---|---|---|---|
IV.SMA1.EHN. | ML:1.0 | 0.000057999999999999994 | 1.66 | AML | other | m | 2021-04-21T11:19:08.03 |
IV.SMA1.EHE. | ML:1.1 | 0.00008 | 1.68 | AML | other | m | 2021-04-21T11:19:08.10 |
IV.NRCA.HHN. | ML:1.0 | 0.00006220000000000001 | 0.08 | AML | other | m | 2021-04-21T11:19:09.86 |
IV.NRCA.HHE. | ML:1.4 | 0.00013550000000000001 | 1.92 | AML | other | m | 2021-04-21T11:19:10.03 |
IV.TERO.HHN. | ML:0.4 | 0.000010785072 | 0.0576 | AML | other | m | 2021-04-21T11:19:11.93 |
IV.TERO.HHE. | ML:0.4 | 0.000009076100499999999 | 0.3776 | AML | other | m | 2021-04-21T11:19:16.56 |