Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 31-08-2021 and time 06:23:22 (Italy) in region Costa Siciliana centro settentrionale (Palermo)

A magnitude ML 2.0 earthquake occured in region: Costa Siciliana centro settentrionale (Palermo), on

  • 31-08-2021 04:23:22 (UTC)
  • 31-08-2021 06:23:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.1060, 13.8970 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Lascari PA 12 3588 3588
Campofelice di Roccella PA 13 7537 11125
Cefalù PA 13 14393 25518
Gratteri PA 17 963 26481

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Bagheria (55387 inhabitants)
47 Km E of Palermo (674435 inhabitants)
70 Km N of Caltanissetta (63360 inhabitants)
93 Km N of Agrigento (59770 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 2.0 2021-08-31
04:23:22		 38.1057 13.8973 10 2021-12-29
11:12:40		 Bollettino Sismico Italiano INGV 96881041
Reviewed
Rev100 		ML 2.0 2021-08-31
04:23:22		 38.1268 13.8893 2 2021-08-31
04:32:28		 Sala Sismica INGV-Roma 94848171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-31 04:23:22 ± 0.17
Latitude 38.1057 ± 0.0126
Longitude 13.8973 ± 0.0046
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96881041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1389
Semi-minor axis of confidence ellipse (meter) 308
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 189
Circular confidence region, given by single value of horizontal uncertainty (meter) 1390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.15378
Epicentral distance of station farthest from the epicenter (degree) 1.32830
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 96881041
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-13 17:29:57

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 94848171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-31 04:32:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2021-08-31T04:23:49.48 0.6 undecidable manual S 94 85.5477 50 1.46 0
IV.SSY.HHZ. 2021-08-31T04:23:47.24 0.6 undecidable manual P 135 147.4413 50 0.53 0
IV.HVIT.HHZ. 2021-08-31T04:23:46.56 0.3 undecidable manual P 156 135.1647 50 1.74 0
IV.HCRL.HHZ. 2021-08-31T04:23:45.43 0.3 undecidable manual P 132 135.0648 50 0.62 0
IV.MCPD.HHZ. 2021-08-31T04:23:45.55 0.6 undecidable manual S 88 72.7716 50 0.94 0
IV.HVZN.HHZ. 2021-08-31T04:23:44.74 0.3 undecidable manual P 145 125.4744 50 1.41 0
IV.RAFF.HHZ. 2021-08-31T04:23:43.04 0.3 undecidable manual P 157 106.116 50 2.69 0
IV.MSFR.HHZ. 2021-08-31T04:23:43.25 0.6 undecidable manual S 97 61.1943 50 1.75 1
IV.HLNI.HHZ. 2021-08-31T04:23:43.63 0.6 undecidable manual P 134 119.8911 50 1.16 0
IV.AIO.HHZ. 2021-08-31T04:23:42.60 0.3 undecidable manual P 97 117.5934 50 0.48 0
IV.IVPL.HHZ. 2021-08-31T04:23:40.06 0.6 undecidable manual P 72 99.0231 50 0.81 0
IV.MPG.HHZ. 2021-08-31T04:23:38.69 0.6 undecidable manual S 278 47.3193 50 0.88 19
IV.MBFT.HHZ. 2021-08-31T04:23:38.03 0.3 undecidable manual P 258 84.3489 50 1.04 0
IV.USI.HHZ. 2021-08-31T04:23:38.08 0.3 undecidable manual P 317 91.4418 50 -0.01 0
IV.MUCR.HHZ. 2021-08-31T04:23:37.60 0.3 undecidable manual P 94 85.5477 50 0.42 0
IV.GALF.HHZ. 2021-08-31T04:23:36.45 0.6 undecidable manual P 127 73.1712 50 1.19 0
IV.IFIL.HHZ. 2021-08-31T04:23:36.84 0.3 undecidable manual P 49 77.8665 50 0.84 0
IV.MCPD.HHZ. 2021-08-31T04:23:35.51 0.3 undecidable manual P 88 72.7716 50 0.3 0
IV.IACL.HHZ. 2021-08-31T04:23:34.66 0.3 undecidable manual P 40 61.8936 50 1.12 1
IV.MSFR.HHZ. 2021-08-31T04:23:34.29 0.6 undecidable manual P 97 61.1943 50 0.87 1
IV.RESU.HHZ. 2021-08-31T04:23:33.71 0.6 undecidable manual P 165 52.8027 50 1.58 8
IV.SOLUN.HHZ. 2021-08-31T04:23:33.10 0.6 undecidable manual S 267 31.8459 50 -0.59 45
IV.PLLN.EHZ. 2021-08-31T04:23:31.98 0.3 undecidable manual S 120 24.8529 111 0.38 71
IV.MPG.HHZ. 2021-08-31T04:23:31.62 0.3 undecidable manual P 278 47.3193 50 0.34 36
IV.SCIAR.HNZ. 2021-08-31T04:23:30.76 0.6 undecidable manual S 215 22.4553 113 -0.06 50
IV.CSLB.HHZ. 2021-08-31T04:23:30.92 0.6 undecidable manual S 143 23.3544 112 -0.19 49
IV.GIB.HHZ. 2021-08-31T04:23:29.24 0.6 undecidable manual S 139 17.0718 119 0.1 50
IV.SOLUN.HHZ. 2021-08-31T04:23:28.72 0.3 undecidable manual P 267 31.8459 50 -0.19 72
IV.SCIAR.HNZ. 2021-08-31T04:23:27.55 0.3 undecidable manual P 215 22.4553 113 0.3 71
IV.PLLN.EHZ. 2021-08-31T04:23:27.64 0.1 negative manual P 120 24.8529 111 -0.06 98
IV.CSLB.HHZ. 2021-08-31T04:23:27.12 0.1 negative manual P 143 23.3544 112 -0.3 94
IV.GIB.HHZ. 2021-08-31T04:23:26.40 0.1 negative manual P 139 17.0718 119 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHN. ML:1.8 0.000432 0.42 AML other m 2021-08-31T04:23:31.05
IV.GIB.HHN. ML:2.2 0.0014249999999999998 0.44 AML other m 2021-08-31T04:23:31.32
IV.SCIAR.HHN. ML:2.2 0.000968 0.36 AML other m 2021-08-31T04:23:31.53
IV.SCIAR.HNN. ML:2.1 0.0008845000000000001 0.2 AML other m 2021-08-31T04:23:31.54
IV.GIB.HHE. ML:2.1 0.0012349999999999998 0.42 AML other m 2021-08-31T04:23:31.82
IV.CSLB.HHE. ML:1.8 0.00038449999999999997 1.76 AML other m 2021-08-31T04:23:32.02
IV.SCIAR.HHE. ML:2.1 0.000892 0.64 AML other m 2021-08-31T04:23:32.83
IV.SCIAR.HNE. ML:2.0 0.0007325 0.62 AML other m 2021-08-31T04:23:32.52
IV.PLLN.EHE. ML:2.0 0.0006705 1.6 AML other m 2021-08-31T04:23:33.15
IV.PLLN.EHN. ML:2.3 0.0011225 1.16 AML other m 2021-08-31T04:23:34.34
IV.SOLUN.HHE. ML:1.9 0.000348 0.38 AML other m 2021-08-31T04:23:34.49
IV.SOLUN.HHN. ML:2.0 0.000502 1.7 AML other m 2021-08-31T04:23:34.06
IV.MPG.HHN. ML:1.6 0.0001225 0.72 AML other m 2021-08-31T04:23:41.70
IV.MPG.HHE. ML:1.6 0.00010109999999999999 1.6 AML other m 2021-08-31T04:23:43.80
IV.RESU.HHN. ML:2.0 0.0002185 0.42 AML other m 2021-08-31T04:23:44.77
IV.RESU.HHE. ML:1.9 0.000186 0.44 AML other m 2021-08-31T04:23:45.42
IV.IACL.HHN. ML:2.2 0.0003325 1.4 AML other m 2021-08-31T04:23:46.12
IV.IACL.HHE. ML:2.2 0.00034199999999999996 0.66 AML other m 2021-08-31T04:23:47.84
IV.MSFR.HHN. ML:1.6 0.00009204999999999999 1.58 AML other m 2021-08-31T04:23:48.79
IV.MCPD.HHE. ML:1.8 0.00008965000000000001 0.36 AML other m 2021-08-31T04:23:48.26
IV.MCPD.HHN. ML:1.8 0.00010045 0.52 AML other m 2021-08-31T04:23:48.61
IV.MSFR.HHE. ML:1.6 0.0000809 0.44 AML other m 2021-08-31T04:23:48.66
IV.GALF.HHE. ML:2.4 0.000384 1.44 AML other m 2021-08-31T04:23:51.84
IV.MBFT.HHE. ML:1.6 0.0000435 0.94 AML other m 2021-08-31T04:23:51.84
IV.MBFT.HHN. ML:1.4 0.000034200000000000005 0.84 AML other m 2021-08-31T04:23:52.03
IV.GALF.HHN. ML:2.3 0.000303 0.62 AML other m 2021-08-31T04:23:52.90
IV.IFIL.HHE. ML:2.7 0.0006805000000000001 0.94 AML other m 2021-08-31T04:23:53.72
IV.IFIL.HHN. ML:2.3 0.0002635 0.52 AML other m 2021-08-31T04:23:54.13
IV.USI.HHE. ML:2.0 0.0001235 0.34 AML other m 2021-08-31T04:23:55.98
IV.MUCR.HHN. ML:2.0 0.000135 0.56 AML other m 2021-08-31T04:23:56.87
IV.USI.HHN. ML:2.4 0.00031 1.18 AML other m 2021-08-31T04:23:56.97
IV.MUCR.HHE. ML:1.9 0.00010915 0.68 AML other m 2021-08-31T04:23:58.42
IV.AIO.HHN. ML:2.0 0.00006934999999999999 0.5 AML other m 2021-08-31T04:24:03.74
IV.HLNI.HHN. ML:1.7 0.00004095 0.62 AML other m 2021-08-31T04:24:03.58
IV.HCRL.HHE. ML:2.0 0.00005765 0.2 AML other m 2021-08-31T04:24:05.45
IV.HLNI.HHE. ML:1.7 0.000036599999999999995 0.78 AML other m 2021-08-31T04:24:05.58
IV.HCRL.HHN. ML:2.0 0.0000594 0.9 AML other m 2021-08-31T04:24:06.99
IV.HVZN.HHN. ML:2.3 0.00014399999999999998 0.5 AML other m 2021-08-31T04:24:06.89
IV.HVZN.HHE. ML:2.3 0.000144 0.38 AML other m 2021-08-31T04:24:10.85
IV.AIO.HHE. ML:1.8 0.000044999999999999996 0.8 AML other m 2021-08-31T04:24:10.93
IV.SSY.HHE. ML:2.5 0.000177 0.44 AML other m 2021-08-31T04:24:12.92
IV.SSY.HHN. ML:2.8 0.00036899999999999997 0.28 AML other m 2021-08-31T04:24:13.66
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
Waveforms Seismic signals in miniseed + resp format Download