Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-05-2013 and time 01:35:48 (Italy) in region 5 km W Sarsina (FC)

A magnitude ML 1.5 earthquake occured in region: 5 km W Sarsina (FC), on

  • 20-05-2013 23:35:48 (UTC)
  • 21-05-2013 01:35:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9110, 12.0760 at 8 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
Sarsina FC 5 3446 3446
Bagno di Romagna FC 10 6026 9472
Mercato Saraceno FC 11 6886 16358
Sant'Agata Feltria RN 12 2151 18509
Verghereto FC 14 1907 20416
Santa Sofia FC 14 4136 24552
Casteldelci RN 15 407 24959
Civitella di Romagna FC 15 3786 28745
Galeata FC 16 2516 31261
Talamello RN 17 1104 32365
Novafeltria RN 17 7164 39529
Pennabilli RN 18 2869 42398
Maiolo RN 19 848 43246

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Cesena (96758 inhabitants)
35 Km S of Forlì (117913 inhabitants)
43 Km W of Rimini (147750 inhabitants)
45 Km SE of Faenza (58541 inhabitants)
52 Km NE of Arezzo (99543 inhabitants)
57 Km SE of Imola (69797 inhabitants)
57 Km S of Ravenna (159116 inhabitants)
67 Km W of Pesaro (94582 inhabitants)
68 Km E of Firenze (382808 inhabitants)
74 Km E of Scandicci (50609 inhabitants)
76 Km W of Fano (60888 inhabitants)
78 Km E of Prato (191150 inhabitants)
87 Km SE of Bologna (386663 inhabitants)
89 Km NE of Siena (53903 inhabitants)
93 Km E of Pistoia (90315 inhabitants)
93 Km N of Perugia (166134 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 1.5 2013-05-20
23:35:48		 43.9108 12.0755 8 2015-01-20
11:26:03		 Bollettino Sismico Italiano INGV 4634511
Reviewed
Rev100 		ML 1.5 2013-05-20
23:35:48		 43.906 12.0858 7 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 3564171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-05-20 23:35:48 ± 0.14
Latitude 43.9108 ± 0.0063
Longitude 12.0755 ± 0.0062
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 4634511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 780
Semi-minor axis of confidence ellipse (meter) 371
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 209
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 205
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.16458
Epicentral distance of station farthest from the epicenter (degree) 0.61244
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:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 4634511
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:25:22

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 3564171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-05-20 23:43:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2013-05-20T23:36:09.30 0.3 undecidable manual S 188 65.0904 50 0.12 68
IV.ATVO.HHZ. 2013-05-20T23:36:09.60 0.6 undecidable manual S 156 64.3911 50 0.62 40
IV.MPAG.EHZ. 2013-05-20T23:36:09.24 1.0 undecidable manual S 119 63.0924 50 0.61 20
IV.ATPI.EHZ. 2013-05-20T23:36:07.38 0.3 undecidable manual S 153 57.3981 50 0.27 67
IV.PIEI.HHZ. 2013-05-20T23:36:06.78 0.3 undecidable manual S 138 55.5999 50 0.15 69
IV.BADI.EHZ. 2013-05-20T23:36:04.01 0.3 undecidable manual S 163 46.5201 50 -0.2 69
IV.RUFI.EHZ. 2013-05-20T23:36:03.96 0.3 undecidable manual S 260 46.0206 50 -0.1 71
IV.ATVO.HHZ. 2013-05-20T23:36:00.37 0.1 undecidable manual P 156 64.3911 50 0 93
IV.MPAG.EHZ. 2013-05-20T23:36:00.55 0.1 undecidable manual P 119 63.0924 50 0.38 86
IV.CAFI.HHZ. 2013-05-20T23:36:00.58 0.1 undecidable manual P 188 65.0904 50 0.1 91
IV.FRON.EHZ. 2013-05-20T23:36:00.94 0.3 undecidable manual P 130 67.9764 50 0.02 69
IV.CRE.HHZ. 2013-05-20T23:36:00.83 0.3 undecidable manual S 197 33.8439 103 0.17 72
IV.ATPI.EHZ. 2013-05-20T23:35:59.20 0.1 undecidable manual P 153 57.3981 50 -0.09 93
IV.FSSB.HHZ. 2013-05-20T23:35:59.89 0.6 undecidable manual P 113 61.1943 50 0.02 47
IV.PARC.HHZ. 2013-05-20T23:35:59.99 0.3 undecidable manual S 156 31.8459 104 0 74
IV.ASQU.HHZ. 2013-05-20T23:35:58.07 0.3 undecidable manual S 241 26.1516 107 0 75
IV.PIEI.HHZ. 2013-05-20T23:35:58.47 0.3 undecidable manual P 138 55.5999 50 -0.54 63
IV.RUFI.EHZ. 2013-05-20T23:35:57.20 0.1 undecidable manual P 260 46.0206 50 -0.33 90
IV.BADI.EHZ. 2013-05-20T23:35:57.28 0.1 undecidable manual P 163 46.5201 50 -0.33 90
IV.SFI.EHZ. 2013-05-20T23:35:55.90 0.3 undecidable manual S 268 18.2706 113 0.41 70
IV.CRE.HHZ. 2013-05-20T23:35:55.17 0.1 undecidable manual P 197 33.8439 103 -0.39 91
IV.ASQU.HHZ. 2013-05-20T23:35:54.07 0.1 undecidable manual P 241 26.1516 107 0 100
IV.PARC.HHZ. 2013-05-20T23:35:54.98 0.1 undecidable manual P 156 31.8459 104 -0.2 95
IV.SFI.EHZ. 2013-05-20T23:35:52.81 0.1 undecidable manual P 268 18.2706 113 0.23 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASQU.HHE. ML:1.7 0.000265 0.24 AML other m 2013-05-20T23:35:58.31
IV.ASQU.HHN. ML:1.9 0.0004465 0.42 AML other m 2013-05-20T23:35:58.34
IV.BADI.EHE. ML:1.4 0.000074205 0.16 AML other m 2013-05-20T23:36:04.85
IV.BADI.EHN. ML:1.4 0.00007960000000000001 0.46 AML other m 2013-05-20T23:36:05.34
IV.CAFI.HHN. ML:1.3 0.000040050000000000004 1.34 AML other m 2013-05-20T23:36:13.08
IV.CAFI.HHE. ML:1.5 0.000053349999999999996 0.54 AML other m 2013-05-20T23:36:13.58
IV.CRE.HHE. ML:1.4 0.00010225 0.78 AML other m 2013-05-20T23:36:04.95
IV.CRE.HHN. ML:1.7 0.0002155 0.24 AML other m 2013-05-20T23:36:02.69
IV.PARC.HHN. ML:1.5 0.00014450000000000002 0.1 AML other m 2013-05-20T23:36:00.23
IV.PARC.HHE. ML:1.2 0.0000717 0.24 AML other m 2013-05-20T23:36:00.48
IV.PIEI.HHE. ML:1.3 0.000046450000000000004 0.14 AML other m 2013-05-20T23:36:07.62
IV.PIEI.HHN. ML:1.0 0.0000207 1.24 AML other m 2013-05-20T23:36:16.65
IV.SFI.EHE. ML:1.6 0.00034550000000000005 0.14 AML other m 2013-05-20T23:35:56.08
IV.SFI.EHN. ML:1.5 0.00026450000000000003 0.26 AML other m 2013-05-20T23:35:56.03
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