A magnitude ML 1.3 earthquake occured in region: 4 km NE Calatafimi Segesta (TP), on
and geographic coordinates (lat, lon) 37.9430, 12.8870 at 7 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 |
---|---|---|---|---|
Calatafimi-Segesta | TP | 4 | 6712 | 6712 |
Alcamo | TP | 8 | 45307 | 52019 |
Castellammare del Golfo | TP | 9 | 15394 | 67413 |
Vita | TP | 10 | 2056 | 69469 |
Gibellina | TP | 15 | 4115 | 73584 |
Salemi | TP | 16 | 10794 | 84378 |
Balestrate | PA | 16 | 6436 | 90814 |
Buseto Palizzolo | TP | 17 | 2957 | 93771 |
Santa Ninfa | TP | 19 | 5043 | 98814 |
Camporeale | PA | 19 | 3373 | 102187 |
Trappeto | PA | 19 | 3174 | 105361 |
Type | Magnitude | Date and Time (UTC) | Latitude | Longitude | Depth (km) | Published time (UTC) | Author | Location ID |
---|---|---|---|---|---|---|---|---|
Bulletin Rev1000 |
ML 1.3 | 2021-04-04 22:55:17 |
37.9432 | 12.8868 | 7 | 2021-07-12 16:55:13 |
Bollettino Sismico Italiano INGV | 90644821 |
Reviewed Rev100 |
ML 1.3 | 2021-04-04 22:55:17 |
37.9387 | 12.9088 | 7 | 2021-04-04 23:04:14 |
Sala Sismica INGV-Roma | 88777421 |
Field | Value |
---|---|
Time (UTC) | 2021-04-04 22:55:17 ± 0.16 |
Latitude | 37.9432 ± 0.0099 |
Longitude | 12.8868 ± 0.0091 |
Depth (km) | 7 ± 1 (from location) |
Evaluation mode of Origin | manual |
Evaluation status of Origin | reviewed |
Version | 1000 -> BULLETIN-INGV |
Event type | earthquake |
Origin ID | 90644821 |
Field | Value |
---|---|
Preferred uncertainty description | uncertainty ellipse |
Semi-major axis of confidence ellipse (meter) | 968 |
Semi-minor axis of confidence ellipse (meter) | 603 |
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | 357 |
Circular confidence region, given by single value of horizontal uncertainty (meter) | 970.0 |
Confidence level of the uncertainty (%) | 68 |
Field | Value |
---|---|
Largest azimuthal gap in station distribution as seen from epicenter (degree) | 127 |
Number of associated phases, regardless of their use for origin computation | 18 |
Number of defining phases | 18 |
RMS of the travel time residuals of the arrivals used for the origin computation (sec) | 0.43 |
Epicentral distance of station closest to the epicenter (degree) | 0.05306 |
Epicentral distance of station farthest from the epicenter (degree) | 0.67989 |
Number of stations at which the event was observed | 11 |
Number of stations from which data was used for origin computation | 11 |
Field | Value |
---|---|
Value | 1.3 |
Uncertainty | 0.2 |
Num. used stations | 10 |
Type of magnitude | ML |
Reference to an origin | 88777421 |
Agency | INGV |
Autore | Sala Sismica INGV-Roma |
Time of creation (UTC) | 2021-04-04 23:04:14 |
Field | Value |
---|---|
Value | 1.3 |
Uncertainty | 0.2 |
Num. used stations | 10 |
Type of magnitude | ML |
Reference to an origin | 90644821 |
Agency | INGV |
Autore | Bollettino Sismico Italiano INGV |
Time of creation (UTC) | 2021-05-31 01:23:38 |
SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance(km) | Takeoff_angle | Residual | Weight |
---|---|---|---|---|---|---|---|---|---|---|
IV.SCIAC.HHZ. | 2021-04-04T22:55:33.93 | 0.6 | undecidable | manual | S | 158 | 51.0156 | 50 | -0.62 | 42 |
IV.SCIAR.HHE. | 2021-04-04T22:55:32.03 | 0.3 | undecidable | manual | P | 90 | 75.4689 | 50 | 0.91 | 53 |
IV.MARS.EHE. | 2021-04-04T22:55:30.02 | 0.6 | undecidable | manual | S | 233 | 35.2425 | 101 | 0.1 | 49 |
IV.SOLUN.HHE. | 2021-04-04T22:55:28.51 | 0.3 | undecidable | manual | P | 74 | 58.7967 | 50 | -0.04 | 71 |
IV.MMGO.HHZ. | 2021-04-04T22:55:28.26 | 0.6 | undecidable | manual | S | 166 | 32.1456 | 102 | -0.63 | 43 |
MN.CLTB.HHE. | 2021-04-04T22:55:27.48 | 0.3 | undecidable | manual | P | 144 | 49.7169 | 50 | 0.32 | 68 |
IV.SCIAC.HHZ. | 2021-04-04T22:55:26.55 | 0.3 | undecidable | manual | P | 158 | 51.0156 | 50 | -0.8 | 58 |
IV.ERC.EHZ. | 2021-04-04T22:55:26.94 | 0.6 | undecidable | manual | S | 292 | 28.2495 | 103 | -0.6 | 44 |
IV.MPG.HHE. | 2021-04-04T22:55:26.98 | 0.3 | undecidable | manual | P | 59 | 47.9187 | 50 | 0.1 | 72 |
IV.CRJA.HHZ. | 2021-04-04T22:55:25.40 | 0.3 | undecidable | manual | S | 147 | 18.7701 | 109 | 1 | 56 |
IV.MARS.EHE. | 2021-04-04T22:55:24.93 | 0.3 | undecidable | manual | P | 233 | 35.2425 | 101 | 0.26 | 71 |
IV.ERC.EHZ. | 2021-04-04T22:55:23.42 | 0.3 | undecidable | manual | P | 292 | 28.2495 | 103 | 0.13 | 74 |
IV.MMGO.HHZ. | 2021-04-04T22:55:23.45 | 0.1 | undecidable | manual | P | 166 | 32.1456 | 102 | -0.62 | 86 |
IV.MTGR.HHZ. | 2021-04-04T22:55:22.64 | 0.6 | undecidable | manual | S | 244 | 12.4764 | 118 | 0.26 | 49 |
IV.CRJA.HHZ. | 2021-04-04T22:55:21.80 | 0.1 | negative | manual | P | 147 | 18.7701 | 109 | 0.32 | 96 |
IV.MTGR.HHZ. | 2021-04-04T22:55:20.51 | 0.1 | positive | manual | P | 244 | 12.4764 | 118 | 0.2 | 100 |
IV.MBFT.HHZ. | 2021-04-04T22:55:20.01 | 0.6 | undecidable | manual | S | 87 | 5.8941 | 138 | -0.53 | 47 |
IV.MBFT.HHZ. | 2021-04-04T22:55:19.02 | 0.1 | positive | manual | P | 87 | 5.8941 | 138 | -0.23 | 100 |
SCNL | mag | Generic_amplitude | Period | Type | Category | Unit | Time_window_reference |
---|---|---|---|---|---|---|---|
IV.MTGR.HHE. | ML:1.3 | 0.000243 | 0.64 | AML | other | m | 2021-04-04T22:55:23.84 |
IV.MTGR.HHN. | ML:1.5 | 0.000419 | 1.48 | AML | other | m | 2021-04-04T22:55:23.20 |
IV.CRJA.HHE. | ML:1.4 | 0.00019350000000000001 | 0.68 | AML | other | m | 2021-04-04T22:55:25.51 |
IV.CRJA.HHN. | ML:1.4 | 0.000241 | 0.5 | AML | other | m | 2021-04-04T22:55:28.19 |
IV.MMGO.HNE. | ML:1.1 | 0.000057566770000000004 | 0.1024 | AML | other | m | 2021-04-04T22:55:28.54 |
IV.MMGO.HHE. | ML:1.1 | 0.0000582 | 0.12 | AML | other | m | 2021-04-04T22:55:28.54 |
IV.MMGO.HNN. | ML:1.0 | 0.00005135189 | 0.1152 | AML | other | m | 2021-04-04T22:55:29.18 |
IV.MMGO.HHN. | ML:1.2 | 0.00006615 | 1.02 | AML | other | m | 2021-04-04T22:55:29.12 |
IV.SCIAC.HHE. | ML:1.2 | 0.000046543380000000004 | 0.9984 | AML | other | m | 2021-04-04T22:55:41.39 |
IV.SCIAC.HHN. | ML:1.3 | 0.000051199125 | 0.5504 | AML | other | m | 2021-04-04T22:55:41.68 |