Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 22-05-2011 and time 15:46:44 (UTC) in region 2 km E Cerignale (PC)

A magnitude ML 2.3 earthquake occured in region: 2 km E Cerignale (PC), on

  • 22-05-2011 15:46:44 (UTC)
  • 22-05-2011 17:46:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.6790, 9.3790 at 1 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
Cerignale PC 2 127 127
Corte Brugnatella PC 4 586 713
Ottone PC 7 516 1229
Zerba PC 7 77 1306
Coli PC 8 879 2185
Bobbio PC 10 3577 5762
Brallo di Pregola PV 10 599 6361
Ferriere PC 10 1294 7655
Gorreto GE 11 97 7752
Rovegno GE 14 554 8306
Santa Margherita di Staffora PV 15 473 8779
Menconico PV 15 360 9139
Santo Stefano d'Aveto GE 16 1126 10265
Fontanigorda GE 16 277 10542
Farini PC 16 1290 11832
Fascia GE 17 81 11913
Rezzoaglio GE 17 995 12908
Carrega Ligure AL 17 84 12992
Rondanina GE 18 62 13054
Romagnese PV 18 687 13741
Montebruno GE 20 240 13981
Fabbrica Curone AL 20 656 14637
Propata GE 20 142 14779

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km NE of Genova (586655 inhabitants)
48 Km SW of Piacenza (102191 inhabitants)
59 Km SE of Pavia (72576 inhabitants)
66 Km E of Alessandria (93943 inhabitants)
72 Km SW of Cremona (71901 inhabitants)
73 Km NW of La Spezia (93959 inhabitants)
76 Km W of Parma (192836 inhabitants)
82 Km SE of Vigevano (63310 inhabitants)
82 Km E of Savona (61345 inhabitants)
88 Km NW of Carrara (63133 inhabitants)
89 Km S of Milano (1345851 inhabitants)
94 Km NW of Massa (69479 inhabitants)
96 Km E of Asti (76202 inhabitants)
96 Km S of Sesto San Giovanni (81608 inhabitants)
98 Km S of Rho (50434 inhabitants)
99 Km S of Cinisello Balsamo (75078 inhabitants)
99 Km W of Reggio nell'Emilia (171345 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 		Md 2.5
ML 2.3 		2011-05-22
15:46:44		 44.679 9.379 1 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1217359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-05-22 15:46:44 ± 0.2
Latitude 44.6790 ± 0.0054
Longitude 9.3790 ± 0.0139
Depth (km) 1 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1217359

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 835
Semi-minor axis of confidence ellipse (meter) 685
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 101
Circular confidence region, given by single value of horizontal uncertainty (meter) 1253.0
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 41
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.57
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.53604
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 1217359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:52:17

Md:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 1217359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:52:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CH.BERNI.HHN. 2011-05-22T15:47:41.93 10.0 undecidable manual Sg 0 0 0
IV.RAVA.EHN. 2011-05-22T15:47:31.20 10.0 undecidable manual Pg 0 0 0
GU.TRAV.HHN. 2011-05-22T15:47:31.81 10.0 undecidable manual Sg 0 0 0
IV.SSFR.HHZ. 2011-05-22T15:47:30.42 10.0 undecidable manual Pg 0 0 0
CH.BERNI.HHN. 2011-05-22T15:47:26.98 10.0 undecidable manual Pg 0 0 0
IV.SFI.EHZ. 2011-05-22T15:47:22.40 10.0 undecidable manual Pg 0 0 0
IV.VMG.SHZ. 2011-05-22T15:47:20.00 10.0 undecidable manual Pg 0 0 0
IV.TEOL.HHZ. 2011-05-22T15:47:18.34 10.0 undecidable manual Pg 0 0 0
MN.VLC.HHE. 2011-05-22T15:47:16.03 10.0 undecidable manual Sg 0 0 0
GU.FINB.HHZ. 2011-05-22T15:47:16.40 0.6 undecidable manual Sg 237 100.3218 0.318 40
IV.SEI.SHZ. 2011-05-22T15:47:16.76 10.0 undecidable manual Pg 0 0 0
IV.DOI.HHZ. 2011-05-22T15:47:15.15 10.0 undecidable manual Pg 0 0 0
IV.QLNO.HHZ. 2011-05-22T15:47:14.28 0.6 undecidable manual Sg 245 90.7425 0.764 35
IV.ERBM.EHZ. 2011-05-22T15:47:14.47 10.0 undecidable manual Pg 0 0 0
GU.TRAV.HHN. 2011-05-22T15:47:12.18 10.0 undecidable manual Pg 0 0 0
IV.ROVR.HHN. 2011-05-22T15:47:12.52 0.3 undecidable manual Pg 50 170.496 -1.073 37
IV.FNVD.HHZ. 2011-05-22T15:47:11.00 0.6 undecidable manual Pg 112 149.3394 0.658 32
IV.MAGA.HHN. 2011-05-22T15:47:10.88 0.6 undecidable manual Pg 38 155.9217 -0.474 34
IV.VARE.HHE. 2011-05-22T15:47:09.19 0.3 undecidable manual Pg 340 140.1486 0.276 55
IV.SALO.HHN. 2011-05-22T15:47:09.12 0.3 undecidable manual Pg 40 137.4624 0.623 51
IV.MONC.HHE. 2011-05-22T15:47:09.97 10.0 undecidable manual Pg 0 0 0
CH.MUGIO.HHZ. 2011-05-22T15:47:08.81 0.3 undecidable manual Pg 349 140.3484 -0.137 57
IV.IMI.HHE. 2011-05-22T15:47:08.86 0.6 undecidable manual Pg 235 145.5432 -0.891 30
GU.PCP.HHZ. 2011-05-22T15:47:07.54 0.6 undecidable manual Sg 257 67.5768 0.196 44
GU.RORO.HHE. 2011-05-22T15:47:06.03 0.3 undecidable manual Pg 239 121.5894 -0.024 61
IV.BDI.HHN. 2011-05-22T15:47:05.00 0.3 undecidable manual Pg 125 118.3926 -0.566 54
GU.MAIM.HHZ. 2011-05-22T15:47:05.61 0.6 undecidable manual Pg 133 122.4885 -0.592 35
GU.FINB.HHZ. 2011-05-22T15:47:02.97 0.3 undecidable manual Pg 237 100.3218 0.191 61
MN.VLC.HHE. 2011-05-22T15:47:02.76 10.0 undecidable manual Pg 0 0 0
IV.QLNO.HHZ. 2011-05-22T15:47:01.24 0.3 undecidable manual Pg 245 90.7425 -0.06 64
IV.CTL8.EHZ. 2011-05-22T15:46:59.10 0.3 undecidable manual Pg 24 72.7716 0.571 59
IV.MSSA.HHZ. 2011-05-22T15:46:59.05 0.6 undecidable manual Sg 165 41.7249 -0.044 47
IV.PRMA.HHZ. 2011-05-22T15:46:59.37 0.3 undecidable manual Pg 82 74.2701 0.609 58
IV.PLMA.HHE. 2011-05-22T15:46:58.82 0.3 undecidable manual Pg 151 79.365 -0.727 55
GU.PCP.HHZ. 2011-05-22T15:46:56.89 0.3 undecidable manual Pg 257 67.5768 -0.843 53
GU.SC2M.HHZ. 2011-05-22T15:46:56.52 0.3 undecidable manual Sg 158 32.9448 0.494 65
IV.MSSA.HHZ. 2011-05-22T15:46:52.81 0.1 undecidable manual Pg 165 41.7249 -0.162 92
GU.SC2M.HHZ. 2011-05-22T15:46:51.41 0.1 undecidable manual Pg 158 32.9448 0.211 92
IV.BOB.HHN. 2011-05-22T15:46:48.50 0.3 undecidable manual Sg 29 11.2776 -0.021 75
IV.MIGL.HHE. 2011-05-22T15:46:46.77 10.0 undecidable manual Pg 0 0 0
IV.BOB.HHN. 2011-05-22T15:46:46.85 0.1 undecidable manual Pg 29 11.2776 -0.015 100
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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