Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 27-09-2011 and time 21:53:24 (Italy) in region Costa Romagnola meridionale (Rimini, Forli Cesena)

A magnitude ML 1.7 earthquake occured in region: Costa Romagnola meridionale (Rimini, Forli Cesena), on

  • 27-09-2011 19:53:24 (UTC)
  • 27-09-2011 21:53:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0740, 12.7470 at 21 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
Riccione RN 11 34965 34965
Gabicce Mare PU 12 5781 40746
Misano Adriatico RN 12 13014 53760
Cattolica RN 12 17125 70885
Rimini RN 15 147750 218635
Gradara PU 15 4835 223470
San Giovanni in Marignano RN 15 9417 232887
Coriano RN 17 10502 243389
San Clemente RN 18 5577 248966
Morciano di Romagna RN 19 7045 256011
Tavullia PU 20 8003 264014

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Rimini (147750 inhabitants)
23 Km NW of Pesaro (94582 inhabitants)
34 Km NW of Fano (60888 inhabitants)
41 Km E of Cesena (96758 inhabitants)
58 Km SE of Ravenna (159116 inhabitants)
59 Km E of Forlì (117913 inhabitants)
73 Km E of Faenza (58541 inhabitants)
80 Km NW of Ancona (100861 inhabitants)
88 Km E of Imola (69797 inhabitants)
97 Km NE of Arezzo (99543 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 2.2
ML 1.7 		2011-09-27
19:53:24		 44.074 12.747 21 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1291359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-09-27 19:53:24 ± 0.21
Latitude 44.0740 ± 0.0117
Longitude 12.7470 ± 0.0163
Depth (km) 21 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1291359

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1380
Semi-minor axis of confidence ellipse (meter) 833
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 1838.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 257
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.26804
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1291359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:34:30

Md:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1291359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:34:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LNSS.HHZ. 2011-09-27T19:53:57.99 10.0 undecidable manual Pg 0 0 0
IV.NRCA.HHE. 2011-09-27T19:53:48.42 0.3 undecidable manual Pg 168 140.748 0.716 49
IV.CESI.HHZ. 2011-09-27T19:53:47.52 10.0 undecidable manual Pg 0 0 0
GU.RORO.HHZ. 2011-09-27T19:53:47.29 10.0 undecidable manual Pg 0 0 0
IV.FRON.EHZ. 2011-09-27T19:53:44.37 0.6 undecidable manual Sg 182 61.6938 0.624 40
IV.PARC.HHZ. 2011-09-27T19:53:44.34 0.6 undecidable manual Sg 221 62.2932 0.448 42
IV.PIEI.HHZ. 2011-09-27T19:53:43.86 0.6 undecidable manual Sg 196 62.0934 0.022 46
IV.T0502.EHZ. 2011-09-27T19:53:41.49 0.6 undecidable manual Sg 249 52.3032 0.183 45
IV.ATCC.EHE. 2011-09-27T19:53:41.70 0.3 undecidable manual Pg 185 98.9232 0.404 59
IV.MPAG.EHZ. 2011-09-27T19:53:40.53 0.3 undecidable manual Sg 179 49.3173 0.002 71
IV.MURB.HHZ. 2011-09-27T19:53:40.98 0.3 undecidable manual Pg 191 91.7415 0.788 52
IV.SNTG.HHZ. 2011-09-27T19:53:40.82 0.3 undecidable manual Pg 170 92.1411 0.563 58
IV.ATVO.HHN. 2011-09-27T19:53:38.42 0.3 undecidable manual Pg 200 81.4518 -0.201 64
IV.SACS.HHE. 2011-09-27T19:53:38.02 10.0 undecidable manual Pg 0 0 0
IV.FSSB.HHN. 2011-09-27T19:53:38.74 0.3 undecidable manual Sg 177 42.3243 0.009 71
IV.BADI.EHE. 2011-09-27T19:53:37.54 0.6 undecidable manual Pg 213 74.37 -0.014 45
IV.SFI.EHN. 2011-09-27T19:53:37.60 0.3 undecidable manual Pg 256 74.2701 0.072 66
IV.SSFR.HHZ. 2011-09-27T19:53:36.89 0.1 undecidable manual Pg 178 70.7736 -0.11 89
IV.ATPC.HHE. 2011-09-27T19:53:36.69 0.3 undecidable manual Pg 200 69.7746 -0.161 66
IV.PARC.HHZ. 2011-09-27T19:53:35.12 0.1 undecidable manual Pg 221 62.2932 -0.598 81
IV.ARVD.HHE. 2011-09-27T19:53:35.89 0.6 undecidable manual Pg 166 65.6898 -0.345 43
IV.FRON.EHZ. 2011-09-27T19:53:35.43 0.1 undecidable manual Pg 182 61.6938 -0.197 89
IV.CPGN.EHZ. 2011-09-27T19:53:35.59 10.0 undecidable manual Pg 0 0 0
IV.PIEI.HHZ. 2011-09-27T19:53:35.11 0.3 undecidable manual Pg 196 62.0934 -0.572 61
IV.T0502.EHZ. 2011-09-27T19:53:34.37 0.3 undecidable manual Pg 249 52.3032 0.145 68
IV.MPAG.EHZ. 2011-09-27T19:53:33.43 0.1 undecidable manual Pg 179 49.3173 -0.342 88
IV.FSSB.HHN. 2011-09-27T19:53:32.46 0.1 undecidable manual Pg 177 42.3243 -0.273 90
IV.PESA.HHZ. 2011-09-27T19:53:32.82 0.3 undecidable manual Sg 153 16.4724 0.029 75
IV.ORI.HHZ. 2011-09-27T19:53:30.03 10.0 undecidable manual Pg 0 0 0
IV.PESA.HHZ. 2011-09-27T19:53:29.32 0.1 undecidable manual Pg 153 16.4724 0.017 100
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