Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 14-04-2021 and time 13:56:28 (UTC) in region Costa Siciliana centro settentrionale (Palermo)

A magnitude ML 1.9 earthquake occured in region: Costa Siciliana centro settentrionale (Palermo), on

  • 14-04-2021 13:56:28 (UTC)
  • 14-04-2021 15:56:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.4340, 13.0550 at 10 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.

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Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NW of Palermo (674435 inhabitants)
56 Km NW of Bagheria (55387 inhabitants)
66 Km NE of Trapani (68759 inhabitants)
89 Km NE of Marsala (83194 inhabitants)
96 Km NE 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 1.9 2021-04-14
13:56:28		 38.4337 13.0548 10 2021-07-12
16:55:10		 Bollettino Sismico Italiano INGV 89958421
Reviewed
Rev100 		ML 1.9 2021-04-14
13:56:27		 38.4333 13.0112 8 2021-04-14
14:20:12		 Sala Sismica INGV-Roma 89097141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-14 13:56:28 ± 0.25
Latitude 38.4337 ± 0.0135
Longitude 13.0548 ± 0.0241
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89958421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2120
Semi-minor axis of confidence ellipse (meter) 1420
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 289
Circular confidence region, given by single value of horizontal uncertainty (meter) 2120.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
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) 0.51
Epicentral distance of station closest to the epicenter (degree) 0.29048
Epicentral distance of station farthest from the epicenter (degree) 1.59090
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 89958421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-14 16:18:12

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 89097141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-14 14:20:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RAFF.HHZ. 2021-04-14T13:56:57.04 0.3 undecidable manual P 139 176.5899 50 0.13 70
IV.MARS.EHE. 2021-04-14T13:56:54.88 0.6 undecidable manual S 210 86.7465 50 0.86 48
IV.PETRA.HHN. 2021-04-14T13:56:48.24 0.6 undecidable manual P 125 113.997 50 0.98 43
IV.SOLUN.HHZ. 2021-04-14T13:56:47.21 0.6 undecidable manual S 132 56.2992 50 1.32 41
IV.GIB.HHE. 2021-04-14T13:56:45.31 0.3 undecidable manual P 120 97.9242 50 0.52 81
IV.CSLB.HHZ. 2021-04-14T13:56:45.07 0.6 undecidable manual P 122 103.3188 50 -0.55 53
MN.CLTB.HHN. 2021-04-14T13:56:44.43 0.6 undecidable manual P 172 95.9262 50 -0.05 60
IV.MBFT.HHZ. 2021-04-14T13:56:43.73 0.6 undecidable manual S 189 54.8007 50 -1.76 31
IV.MARS.EHE. 2021-04-14T13:56:42.58 0.6 undecidable manual P 210 86.7465 50 -0.49 56
IV.CRJA.HHE. 2021-04-14T13:56:41.48 0.6 undecidable manual P 184 70.2741 50 0.96 48
IV.MTGR.HHZ. 2021-04-14T13:56:40.00 0.3 undecidable manual P 203 65.1903 50 0.25 92
IV.MPG.HHZ. 2021-04-14T13:56:40.21 0.6 undecidable manual S 139 40.2264 50 -1.38 41
IV.USI.HHZ. 2021-04-14T13:56:39.52 0.6 undecidable manual S 19 32.2455 50 0.04 68
IV.MBFT.HHZ. 2021-04-14T13:56:38.62 0.3 undecidable manual P 189 54.8007 50 0.48 89
IV.SOLUN.HHZ. 2021-04-14T13:56:38.32 0.3 undecidable manual P 132 56.2992 50 -0.05 98
IV.ERC.EHZ. 2021-04-14T13:56:38.21 0.6 undecidable manual P 223 59.8956 50 -0.71 54
IV.USI.HHZ. 2021-04-14T13:56:34.52 0.3 undecidable manual P 19 32.2455 50 -0.15 100
IV.MPG.HHZ. 2021-04-14T13:56:34.79 0.3 undecidable manual P 139 40.2264 50 -1.1 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.USI.HHE. ML:1.9 0.0003425348 0.1792 AML other m 2021-04-14T13:56:43.33
IV.USI.HHN. ML:2.4 0.0011326541 0.1792 AML other m 2021-04-14T13:56:43.91
IV.MPG.HHE. ML:1.9 0.00028000000000000003 0.22 AML other m 2021-04-14T13:56:44.28
IV.MPG.HHN. ML:1.8 0.00023755425 0.224 AML other m 2021-04-14T13:56:45.45
IV.MBFT.HHN. ML:1.6 0.00008740000000000001 0.34 AML other m 2021-04-14T13:56:46.93
IV.MBFT.HHE. ML:1.7 0.00010299530500000001 0.1984 AML other m 2021-04-14T13:56:47.52
IV.ERC.EHN. ML:2.0 0.0001955 0.46 AML other m 2021-04-14T13:56:47.67
IV.ERC.EHE. ML:1.9 0.0001475 0.26 AML other m 2021-04-14T13:56:48.23
IV.SOLUN.HHN. ML:2.0 0.00021700000000000002 0.48 AML other m 2021-04-14T13:56:51.63
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