Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 24-05-2011 and time 21:27:55 (UTC) in region 7 km W Sarsina (FC)

A magnitude ML 2.1 earthquake occured in region: 7 km W Sarsina (FC), on

  • 24-05-2011 21:27:55 (UTC)
  • 24-05-2011 23:27:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.8990, 12.0640 at 3 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 7 3446 3446
Bagno di Romagna FC 8 6026 9472
Sant'Agata Feltria RN 12 2151 11623
Verghereto FC 12 1907 13530
Mercato Saraceno FC 13 6886 20416
Santa Sofia FC 14 4136 24552
Casteldelci RN 14 407 24959
Civitella di Romagna FC 16 3786 28745
Galeata FC 16 2516 31261
Talamello RN 18 1104 32365
Novafeltria RN 18 7164 39529
Pennabilli RN 18 2869 42398

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Cesena (96758 inhabitants)
36 Km S of Forlì (117913 inhabitants)
44 Km W of Rimini (147750 inhabitants)
45 Km SE of Faenza (58541 inhabitants)
50 Km NE of Arezzo (99543 inhabitants)
58 Km SE of Imola (69797 inhabitants)
59 Km S of Ravenna (159116 inhabitants)
66 Km E of Firenze (382808 inhabitants)
68 Km W of Pesaro (94582 inhabitants)
72 Km E of Scandicci (50609 inhabitants)
77 Km W of Fano (60888 inhabitants)
77 Km E of Prato (191150 inhabitants)
87 Km NE of Siena (53903 inhabitants)
88 Km SE of Bologna (386663 inhabitants)
92 Km N of Perugia (166134 inhabitants)
92 Km E of Pistoia (90315 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 2.1 		2011-05-24
21:27:55		 43.899 12.064 3 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1218799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-05-24 21:27:55 ± 0.27
Latitude 43.8990 ± 0.0126
Longitude 12.0640 ± 0.0150
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1218799

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1638
Semi-minor axis of confidence ellipse (meter) 637
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
Circular confidence region, given by single value of horizontal uncertainty (meter) 1843.9
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 41
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.95238
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 1218799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:54:14

Md:2.5

Field Value
Value 2.5
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1218799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:54:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LNSS.HHE. 2011-05-24T21:28:28.92 10.0 undecidable manual Sg 0 0 0
IV.NRCA.HHZ. 2011-05-24T21:28:24.87 10.0 undecidable manual Pg 0 0 0
IV.FDMO.HHE. 2011-05-24T21:28:21.89 10.0 undecidable manual Pg 0 0 0
IV.TRIF.HHE. 2011-05-24T21:28:20.18 10.0 undecidable manual Pg 0 0 0
IV.MCIV.HHN. 2011-05-24T21:28:19.18 10.0 undecidable manual Pg 0 0 0
IV.CING.HHZ. 2011-05-24T21:28:19.87 10.0 undecidable manual Pg 0 0 0
IV.ARCI.HHZ. 2011-05-24T21:28:18.26 10.0 undecidable manual Pg 0 0 0
IV.MTRZ.HHN. 2011-05-24T21:28:17.98 10.0 undecidable manual Sg 0 0 0
IV.ATVO.HHN. 2011-05-24T21:28:17.56 0.6 undecidable manual Sg 154 63.5919 0.473 54
IV.FIR.HHZ. 2011-05-24T21:28:16.47 10.0 undecidable manual Pg 0 0 0
IV.SNTG.HHN. 2011-05-24T21:28:16.59 10.0 undecidable manual Pg 0 0 0
IV.ATPC.HHN. 2011-05-24T21:28:15.47 0.6 undecidable manual Sg 146 56.0994 0.382 56
.SEI.SHE. 2011-05-24T21:28:15.16 1.0 undecidable manual Sg 287 58.8966 -0.682 25
IV.MGAB.HHZ. 2011-05-24T21:28:15.97 10.0 undecidable manual Pg 0 0 0
IV.FROS.HHZ. 2011-05-24T21:28:14.70 0.6 undecidable manual Pg 224 105.7164 0.049 55
IV.PIEI.HHN. 2011-05-24T21:28:14.87 0.6 undecidable manual Sg 137 55.2003 0.014 61
IV.PESA.HHZ. 2011-05-24T21:28:14.81 10.0 undecidable manual Pg 0 0 0
IV.MTRZ.HHN. 2011-05-24T21:28:12.27 10.0 undecidable manual Pg 0 0 0
IV.BLLA.EHN. 2011-05-24T21:28:12.31 10.0 undecidable manual Pg 0 0 0
IV.MURB.HHN. 2011-05-24T21:28:11.15 10.0 undecidable manual Pg 0 0 0
IV.BADI.EHZ. 2011-05-24T21:28:11.84 0.6 undecidable manual Sg 161 45.5211 0.028 62
IV.FNVD.HHZ. 2011-05-24T21:28:11.43 0.1 undecidable manual Pg 292 80.7636 0.622 100
IV.VMG.SHZ. 2011-05-24T21:28:10.42 0.6 undecidable manual Sg 280 42.1245 -0.219 60
IV.ATTE.HHZ. 2011-05-24T21:28:10.01 10.0 undecidable manual Pg 0 0 0
IV.SSFR.HHE. 2011-05-24T21:28:09.17 10.0 undecidable manual Pg 0 0 0
IV.FRON.EHZ. 2011-05-24T21:28:09.39 10.0 undecidable manual Pg 0 0 0
IV.ATVO.HHN. 2011-05-24T21:28:07.82 0.3 undecidable manual Pg 154 63.5919 -0.34 84
IV.PIEI.HHN. 2011-05-24T21:28:06.75 0.3 undecidable manual Pg 137 55.2003 -0.119 89
IV.ATPC.HHN. 2011-05-24T21:28:06.77 0.3 undecidable manual Pg 146 56.0994 -0.23 87
.SEI.SHE. 2011-05-24T21:28:06.84 0.3 undecidable manual Pg 287 58.8966 -0.594 79
IV.BADI.EHZ. 2011-05-24T21:28:04.90 0.6 undecidable manual Pg 161 45.5211 -0.217 59
IV.ASQU.HHZ. 2011-05-24T21:28:04.31 0.6 undecidable manual Sg 243 24.753 -0.329 60
IV.VMG.SHZ. 2011-05-24T21:28:04.38 0.3 undecidable manual Pg 280 42.1245 -0.054 93
IV.SFI.EHN. 2011-05-24T21:28:02.32 0.3 undecidable manual Sg 272 17.3715 0.206 94
IV.ASQU.HHZ. 2011-05-24T21:28:01.11 0.3 undecidable manual Pg 243 24.753 0.136 94
IV.SFI.EHN. 2011-05-24T21:27:59.85 0.3 undecidable manual Pg 272 17.3715 0.338 91
IV.CRAC.EHN. 2011-05-24T21:27:29.62 10.0 undecidable manual Pg 0 0 0
IV.LNSS.HHE. 2011-05-24T21:27:04.26 10.0 undecidable manual Pg 0 0 0
NI.SABO.HHN. 2011-05-24T21:26:57.84 10.0 undecidable manual Pg 0 0 0
NI.CGRP.HHN. 2011-05-24T21:26:48.11 10.0 undecidable manual Pg 0 0 0
IV.TEOL.HHN. 2011-05-24T21:26:45.83 10.0 undecidable manual Pg 0 0 0
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