Earthquake with magnitude of ML 1.8 on date 30-12-2020 and time 02:22:00 (UTC) in region 7 km W Casteltermini (AG)

A magnitude ML 1.8 earthquake occured in region: 7 km W Casteltermini (AG), on

  • 30-12-2020 02:22:00 (UTC)
  • 30-12-2020 03:22:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.5690, 13.5680 at 40 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Casteltermini AG 7 8267 8267
San Biagio Platani AG 8 3304 11571
Santo Stefano Quisquina AG 9 4684 16255
San Giovanni Gemini AG 10 8056 24311
Cammarata AG 10 6355 30666
Sant'Angelo Muxaro AG 10 1390 32056
Alessandria della Rocca AG 10 2988 35044
Acquaviva Platani CL 12 948 35992
Bivona AG 13 3717 39709
Castronovo di Sicilia PA 13 3085 42794
Cianciana AG 13 3474 46268
Campofranco CL 14 3100 49368
Santa Elisabetta AG 15 2474 51842
Sutera CL 15 1410 53252
Mussomeli CL 17 10780 64032
Milena CL 18 3018 67050
Raffadali AG 18 12856 79906
Aragona AG 19 9463 89369
Comitini AG 19 968 90337
Joppolo Giancaxio AG 20 1245 91582

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of Agrigento (59770 inhabitants)
44 Km W of Caltanissetta (63360 inhabitants)
57 Km S of Bagheria (55387 inhabitants)
64 Km S of Palermo (674435 inhabitants)
82 Km NW of Gela (75827 inhabitants)
87 Km E of Mazara del Vallo (51718 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.8 2020-12-30
02:22:00
37.5687 13.5682 40 2021-02-26
14:56:14
Bollettino Sismico Italiano INGV 86201611
Reviewed
Rev100
ML 1.9 2020-12-30
02:22:00
37.5675 13.5582 43 2020-12-30
02:33:09
Sala Sismica INGV-Roma 85867051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-30 02:22:00 ± 0.34
Latitude 37.5687 ± 0.0261
Longitude 13.5682 ± 0.0204
Depth (km) 40 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86201611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2829
Semi-minor axis of confidence ellipse (meter) 1734
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 184
Circular confidence region, given by single value of horizontal uncertainty (meter) 2830.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
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) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.71946
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 86201611
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-27 16:11:23

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85867051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-30 02:33:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSLB.HHZ. 2020-12-30T02:22:20.40 0.6 undecidable manual S 46 59.2962 96 -0.29 57
IV.SCIAR.HHE. 2020-12-30T02:22:17.86 0.6 undecidable manual S 21 44.2224 109 0.35 67
IV.RESU.HHZ. 2020-12-30T02:22:17.40 0.6 undecidable manual S 78 43.8228 110 -0.03 65
IV.RAFF.HHZ. 2020-12-30T02:22:15.71 1.0 undecidable manual P 119 79.8645 93 0.94 23
IV.CMDO.HHZ. 2020-12-30T02:22:14.50 0.6 undecidable manual S 117 25.2525 136 0.42 63
IV.MTGR.HHZ. 2020-12-30T02:22:14.78 0.6 undecidable manual P 297 79.5648 93 0.04 61
IV.CSLB.HHZ. 2020-12-30T02:22:12.31 0.3 undecidable manual P 46 59.2962 96 0.09 98
IV.MCT.HHZ. 2020-12-30T02:22:12.10 0.6 undecidable manual S 32 6.5934 168 -0.06 72
IV.PETRA.HHE. 2020-12-30T02:22:11.91 0.3 undecidable manual P 58 56.2992 98 0.07 99
IV.SOLUN.HHE. 2020-12-30T02:22:11.41 0.6 undecidable manual P 357 58.0974 97 -0.66 55
IV.SCIAR.HHE. 2020-12-30T02:22:11.18 0.6 undecidable manual P 21 44.2224 109 0.8 56
IV.RESU.HHZ. 2020-12-30T02:22:09.46 0.3 undecidable manual P 78 43.8228 110 -0.88 77
IV.CMDO.HHZ. 2020-12-30T02:22:08.05 0.3 undecidable manual P 117 25.2525 136 -0.35 100
IV.MCT.HHZ. 2020-12-30T02:22:07.47 0.6 undecidable manual P 32 6.5934 168 0.18 69
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CMDO.HHN. ML:1.9 0.0002385057 0.72 AML other m 2020-12-30T02:22:15.78
IV.CMDO.HHE. ML:1.8 0.00018525279999999998 0.04 AML other m 2020-12-30T02:22:15.78
IV.RESU.HHN. ML:2.0 0.00023108044999999998 1.6 AML other m 2020-12-30T02:22:19.04
IV.CSLB.HHN. ML:1.4 0.000043904739999999996 0.68 AML other m 2020-12-30T02:22:20.41
IV.CSLB.HHE. ML:1.7 0.00008475834 1.36 AML other m 2020-12-30T02:22:20.31
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download