Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 15-07-2021 and time 01:45:25 (Italy) in region Costa Siciliana centro settentrionale (Palermo)

A magnitude ML 1.8 earthquake occured in region: Costa Siciliana centro settentrionale (Palermo), on

  • 14-07-2021 23:45:25 (UTC)
  • 15-07-2021 01:45:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.3420, 13.7710 at 29 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
37 Km NE of Bagheria (55387 inhabitants)
44 Km NE of Palermo (674435 inhabitants)
98 Km N of Caltanissetta (63360 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 2021-07-14
23:45:25		 38.3422 13.7708 29 2021-12-29
11:12:16		 Bollettino Sismico Italiano INGV 93305991
Reviewed
Rev100 		ML 1.7 2021-07-14
23:45:27		 38.3427 13.8097 25 2021-07-15
00:11:55		 Sala Sismica INGV-Roma 92768951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-14 23:45:25 ± 0.51
Latitude 38.3422 ± 0.0171
Longitude 13.7708 ± 0.0218
Depth (km) 29 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 93305991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2120
Semi-minor axis of confidence ellipse (meter) 194
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 313
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) 119
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.31206
Epicentral distance of station farthest from the epicenter (degree) 0.91641
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:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 92768951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-15 00:11:55

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 93305991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-02 18:14:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ALJA.HHE. 2021-07-14T23:45:48.39 0.3 undecidable manual S 181 65.7897 109 1.73 22
IV.IACL.HHE. 2021-07-14T23:45:44.00 0.6 undecidable manual S 67 55.0005 113 0.05 62
IV.MUCR.HHZ. 2021-07-14T23:45:43.40 0.3 undecidable manual P 109 101.7204 102 0.19 0
IV.PLLN.EHZ. 2021-07-14T23:45:43.43 0.3 undecidable manual S 140 50.616 115 0.56 83
IV.GIB.HHE. 2021-07-14T23:45:42.23 0.6 undecidable manual S 150 44.9217 118 0.7 53
IV.CSLB.HHZ. 2021-07-14T23:45:42.04 0.6 undecidable manual S 151 51.4152 114 -1.03 53
IV.RESU.HHE. 2021-07-14T23:45:41.35 0.3 undecidable manual P 162 81.0522 105 1.25 0
IV.MCPD.HHE. 2021-07-14T23:45:41.38 0.3 undecidable manual P 106 87.246 104 0.36 0
IV.MBFT.HHE. 2021-07-14T23:45:41.92 0.3 undecidable manual P 239 83.7495 104 1.42 0
IV.MSFR.HHZ. 2021-07-14T23:45:40.14 0.3 undecidable manual P 115 79.365 105 0.3 1
IV.SOLUN.HHZ. 2021-07-14T23:45:39.30 0.3 undecidable manual S 217 34.6431 125 0.12 100
IV.IFIL.HHZ. 2021-07-14T23:45:39.64 0.3 undecidable manual P 70 74.0703 106 0.57 10
IV.ALJA.HHE. 2021-07-14T23:45:39.28 0.3 undecidable manual P 181 65.7897 109 1.43 26
IV.USI.HHZ. 2021-07-14T23:45:39.01 0.3 undecidable manual P 308 65.49 109 1.21 29
IV.IACL.HHE. 2021-07-14T23:45:36.26 0.3 undecidable manual P 67 55.0005 113 -0.03 95
IV.CSLB.HHZ. 2021-07-14T23:45:35.14 0.3 undecidable manual P 151 51.4152 114 -0.64 93
IV.PLLN.EHZ. 2021-07-14T23:45:34.96 0.3 undecidable manual P 140 50.616 115 -0.7 91
IV.GIB.HHE. 2021-07-14T23:45:34.55 0.3 undecidable manual P 150 44.9217 118 -0.34 98
IV.SOLUN.HHZ. 2021-07-14T23:45:32.72 0.3 undecidable manual P 217 34.6431 125 -0.82 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SOLUN.HHN. ML:1.8 0.00020502745 0.3584 AML other m 2021-07-14T23:45:41.08
IV.SOLUN.HHE. ML:1.7 0.00014359218 0.5248 AML other m 2021-07-14T23:45:42.70
IV.CSLB.HHE. ML:1.6 0.00009235 0.78 AML other m 2021-07-14T23:45:43.27
IV.CSLB.HHN. ML:1.5 0.00007210527 0.3968 AML other m 2021-07-14T23:45:44.06
IV.PLLN.EHE. ML:1.8 0.00014637035 2.2912 AML other m 2021-07-14T23:45:44.47
IV.PLLN.EHN. ML:2.1 0.00026989164999999997 0.4224 AML other m 2021-07-14T23:45:47.07
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