Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.2 on date 23-01-2016 and time 01:47:44 (Italy) in region 2 km E Valledolmo (PA)

A magnitude ML 2.2 earthquake occured in region: 2 km E Valledolmo (PA), on

  • 23-01-2016 00:47:44 (UTC)
  • 23-01-2016 01:47:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7490, 13.8520 at 36 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
Valledolmo PA 2 3594 3594
Vallelunga Pratameno CL 8 3461 7055
Sclafani Bagni PA 8 426 7481
Caltavuturo PA 9 4017 11498
Villalba CL 10 1633 13131
Alia PA 13 3623 16754
Scillato PA 13 613 17367
Montemaggiore Belsito PA 14 3365 20732
Aliminusa PA 14 1236 21968
Polizzi Generosa PA 15 3407 25375
Castellana Sicula PA 17 3411 28786
Marianopoli CL 18 1906 30692
Resuttano CL 18 2038 32730
Cerda PA 18 5330 38060
Roccapalumba PA 20 2516 40576
Blufi PA 20 1029 41605

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NW of Caltanissetta (63360 inhabitants)
47 Km SE of Bagheria (55387 inhabitants)
54 Km NE of Agrigento (59770 inhabitants)
59 Km SE of Palermo (674435 inhabitants)
84 Km NW of Gela (75827 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 2.2 2016-01-23
00:47:44		 37.7487 13.8518 36 2016-05-17
13:16:22		 Bollettino Sismico Italiano INGV 23413531
Reviewed
Rev100 		ML 2.1 2016-01-23
00:47:44		 37.7637 13.8352 36 2016-01-23
01:03:53		 Sala Sismica INGV-Roma 23200281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-01-23 00:47:44 ± 0.12
Latitude 37.7487 ± 0.0090
Longitude 13.8518 ± 0.0125
Depth (km) 36 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 23413531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1089
Semi-minor axis of confidence ellipse (meter) 909
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 247
Circular confidence region, given by single value of horizontal uncertainty (meter) 1090.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.19156
Epicentral distance of station farthest from the epicenter (degree) 1.40384
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.5
Num. used stations 9
Type of magnitude ML
Reference to an origin 23200281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-01-23 01:03:51

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 23413531
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-02-10 09:32:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2016-01-23T00:48:20.48 0.6 undecidable manual S 121 125.9739 54 0.95 41
IV.HMDC.HHZ. 2016-01-23T00:48:18.73 0.6 undecidable manual S 137 120.0909 54 0.48 51
IV.MEU.SHZ. 2016-01-23T00:48:16.64 0.3 undecidable manual S 129 111.4995 54 0.24 82
IV.HLNI.HHZ. 2016-01-23T00:48:14.70 0.6 undecidable manual S 116 100.122 54 0.75 47
IV.HPAC.HHZ. 2016-01-23T00:48:08.41 0.6 undecidable manual P 137 155.8218 54 -0.16 50
IV.HAVL.HHZ. 2016-01-23T00:48:06.56 0.3 undecidable manual P 128 142.1466 54 -0.31 76
IV.SSY.HHZ. 2016-01-23T00:48:04.78 0.3 undecidable manual P 121 125.9739 54 -0.08 82
IV.HAGA.HHZ. 2016-01-23T00:48:04.63 0.3 undecidable manual P 114 125.6742 54 -0.19 81
IV.ILLI.HHZ. 2016-01-23T00:48:04.05 1.0 undecidable manual P 51 123.0879 54 -0.44 26
IV.HMDC.HHZ. 2016-01-23T00:48:03.62 0.6 undecidable manual P 137 120.0909 54 -0.5 51
IV.MEU.SHZ. 2016-01-23T00:48:02.62 0.3 undecidable manual P 129 111.4995 54 -0.43 79
IV.HLNI.HHZ. 2016-01-23T00:48:01.08 0.3 undecidable manual P 116 100.122 54 -0.56 78
IV.GIB.HHZ. 2016-01-23T00:47:58.63 0.6 undecidable manual S 30 30.8469 136 0.07 66
IV.PETRA.HHZ. 2016-01-23T00:47:57.55 0.6 undecidable manual S 68 24.8529 143 0.02 67
IV.RESU.HHZ. 2016-01-23T00:47:57.30 0.6 undecidable manual S 122 21.2676 147 0.34 64
IV.CSLB.HHZ. 2016-01-23T00:47:57.59 0.6 undecidable manual S 41 27.6501 139 -0.4 62
IV.MPG.SHE. 2016-01-23T00:47:57.38 0.6 undecidable manual P 317 62.8926 115 0.57 55
IV.CLTA.HHE. 2016-01-23T00:47:56.76 0.6 undecidable manual P 172 66.2781 114 -0.52 55
MN.CLTB.HHE. 2016-01-23T00:47:56.53 0.6 undecidable manual P 251 58.9965 117 0.26 61
IV.FAVR.HHE. 2016-01-23T00:47:56.31 0.6 undecidable manual P 197 55.7997 119 0.46 58
IV.SOLUN.HHE. 2016-01-23T00:47:54.95 0.6 undecidable manual P 324 47.2194 123 0.24 62
IV.GIB.HHZ. 2016-01-23T00:47:53.01 0.3 undecidable manual P 30 30.8469 136 0.26 95
IV.PETRA.HHZ. 2016-01-23T00:47:52.25 0.3 undecidable manual P 68 24.8529 143 0.09 99
IV.CSLB.HHZ. 2016-01-23T00:47:52.37 0.3 undecidable manual P 41 27.6501 139 -0.05 100
IV.RESU.HHZ. 2016-01-23T00:47:51.57 0.3 undecidable manual P 122 21.2676 147 -0.26 96
IV.MCT.BHE. 2016-01-23T00:47:51.93 0.6 undecidable manual P 236 25.8519 141 -0.32 63
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHE. ML:2.4 0.000132 1.32 AML other m 2016-01-23T00:48:26.68
IV.HAVL.HHN. ML:2.4 0.00013000000000000002 1.52 AML other m 2016-01-23T00:48:27.69
IV.HLNI.HHE. ML:2.0 0.00009755 1.16 AML other m 2016-01-23T00:48:16.82
IV.HLNI.HHN. ML:2.0 0.00009085 0.1 AML other m 2016-01-23T00:48:17.25
IV.HMDC.HHE. ML:2.2 0.00010015000000000001 0.48 AML other m 2016-01-23T00:48:20.56
IV.HMDC.HHN. ML:2.1 0.0000906 0.7 AML other m 2016-01-23T00:48:20.60
IV.MEU.SHE. ML:0.0 0.00014399999999999998 0.84 AML other m 2016-01-23T00:48:18.99
IV.MEU.SHN. ML:0.0 0.0002035 1.52 AML other m 2016-01-23T00:48:19.35
IV.RESU.HHN. ML:1.9 0.000243 0.54 AML other m 2016-01-23T00:47:59.56
IV.RESU.HHE. ML:1.8 0.00020800000000000001 0.52 AML other m 2016-01-23T00:47:59.07
IV.SSY.HHN. ML:2.7 0.00029549999999999997 0.8 AML other m 2016-01-23T00:48:24.29
IV.SSY.HHE. ML:2.4 0.0001535 1.04 AML other m 2016-01-23T00:48:22.20
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