Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 25-09-2011 and time 21:42:35 (Italy) in region Costa Romagnola meridionale (Rimini, Forli Cesena)

A magnitude ML 1.2 earthquake occured in region: Costa Romagnola meridionale (Rimini, Forli Cesena), on

  • 25-09-2011 19:42:35 (UTC)
  • 25-09-2011 21:42:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1030, 12.7510 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 14 34965 34965
Misano Adriatico RN 15 13014 47979
Gabicce Mare PU 15 5781 53760
Rimini RN 15 147750 201510
Cattolica RN 15 17125 218635
Gradara PU 18 4835 223470
San Giovanni in Marignano RN 18 9417 232887
Coriano RN 19 10502 243389

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Rimini (147750 inhabitants)
25 Km NW of Pesaro (94582 inhabitants)
36 Km NW of Fano (60888 inhabitants)
41 Km E of Cesena (96758 inhabitants)
56 Km SE of Ravenna (159116 inhabitants)
58 Km E of Forlì (117913 inhabitants)
72 Km E of Faenza (58541 inhabitants)
82 Km NW of Ancona (100861 inhabitants)
87 Km E of Imola (69797 inhabitants)
99 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 2.1
ML 1.2 		2011-09-25
19:42:35		 44.103 12.751 21 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1290649
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-09-25 19:42:35 ± 0.28
Latitude 44.1030 ± 0.0126
Longitude 12.7510 ± 0.0263
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 1290649

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1839
Semi-minor axis of confidence ellipse (meter) 1109
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 87
Circular confidence region, given by single value of horizontal uncertainty (meter) 2523.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 292
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.69608
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1290649
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:33:31

Md:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1290649
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:33:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BADI.EHZ. 2011-09-25T19:42:59.40 0.6 undecidable manual Sg 212 77.2671 0.173 48
IV.ATPC.HHE. 2011-09-25T19:42:58.74 0.6 undecidable manual Sg 199 72.8715 0.673 43
IV.MURB.HHN. 2011-09-25T19:42:57.15 10.0 undecidable manual Pg 0 0 0
IV.ARVD.HHE. 2011-09-25T19:42:57.92 0.3 undecidable manual Sg 167 68.7756 0.94 58
IV.PIEI.HHE. 2011-09-25T19:42:56.12 0.6 undecidable manual Sg 195 65.2902 0.064 49
IV.PARC.HHN. 2011-09-25T19:42:55.61 0.3 undecidable manual Sg 219 64.9905 -0.367 68
IV.FRON.EHZ. 2011-09-25T19:42:55.99 0.6 undecidable manual Sg 182 64.8906 0.024 49
IV.MPAG.EHE. 2011-09-25T19:42:52.48 0.3 undecidable manual Sg 179 52.503 -0.261 70
IV.FSSB.HHN. 2011-09-25T19:42:50.61 0.3 undecidable manual Sg 177 45.5211 -0.314 71
IV.BADI.EHZ. 2011-09-25T19:42:49.59 0.3 undecidable manual Pg 212 77.2671 0.214 70
IV.ATPC.HHE. 2011-09-25T19:42:48.68 0.3 undecidable manual Pg 199 72.8715 -0.033 72
IV.SSFR.HHN. 2011-09-25T19:42:48.74 0.3 undecidable manual Pg 178 73.9704 -0.131 70
IV.FRON.EHZ. 2011-09-25T19:42:47.48 0.3 undecidable manual Pg 182 64.8906 -0.023 73
IV.ARVD.HHE. 2011-09-25T19:42:47.88 0.6 undecidable manual Pg 167 68.7756 -0.202 47
IV.PIEI.HHE. 2011-09-25T19:42:47.21 0.3 undecidable manual Pg 195 65.2902 -0.337 68
IV.PARC.HHN. 2011-09-25T19:42:47.22 0.3 undecidable manual Pg 219 64.9905 -0.285 70
IV.MPAG.EHE. 2011-09-25T19:42:45.39 0.3 undecidable manual Pg 179 52.503 -0.243 72
IV.CPGN.EHE. 2011-09-25T19:42:45.92 0.6 undecidable manual Pg 226 48.0186 0.964 38
IV.FSSB.HHN. 2011-09-25T19:42:44.35 0.3 undecidable manual Pg 177 45.5211 -0.235 73
IV.PESA.HHN. 2011-09-25T19:42:44.60 0.6 undecidable manual Sg 158 19.2696 -0.09 53
IV.PESA.HHN. 2011-09-25T19:42:41.32 0.1 undecidable manual Pg 158 19.2696 0.332 100
IV.CELB.HHE. 2011-09-25T19:42:33.15 10.0 undecidable manual Pg 0 0 0
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