Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-05-2009 and time 09:00:31 (Italy) in region 1 km W Bellaria Igea Marina (RN)

A magnitude ML 1.5 earthquake occured in region: 1 km W Bellaria Igea Marina (RN), on

  • 21-05-2009 07:00:31 (UTC)
  • 21-05-2009 09:00:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1480, 12.4510 at 30 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
Bellaria-Igea Marina RN 1 19519 19519
San Mauro Pascoli FC 5 11690 31209
Gatteo FC 7 9068 40277
Savignano sul Rubicone FC 7 17766 58043
Cesenatico FC 7 25796 83839
Santarcangelo di Romagna RN 9 22089 105928
Gambettola FC 9 10660 116588
Longiano FC 13 7126 123714
Rimini RN 13 147750 271464
Montiano FC 14 1716 273180
Borghi FC 15 2843 276023
Cervia RA 15 28940 304963
Roncofreddo FC 16 3386 308349
Cesena FC 17 96758 405107
Verucchio RN 18 10078 415185
Poggio Torriana RN 19 5135 420320
Sogliano al Rubicone FC 20 3195 423515

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NW of Rimini (147750 inhabitants)
17 Km E of Cesena (96758 inhabitants)
34 Km E of Forlì (117913 inhabitants)
36 Km SE of Ravenna (159116 inhabitants)
46 Km NW of Pesaro (94582 inhabitants)
48 Km E of Faenza (58541 inhabitants)
57 Km NW of Fano (60888 inhabitants)
63 Km E of Imola (69797 inhabitants)
88 Km NE of Arezzo (99543 inhabitants)
96 Km E of Bologna (386663 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 1.5 		2009-05-21
07:00:31		 44.148 12.451 30 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 873989
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-05-21 07:00:31 ± 0.24
Latitude 44.1480 ± 0.0090
Longitude 12.4510 ± 0.0088
Depth (km) 30 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 873989

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 799
Semi-minor axis of confidence ellipse (meter) 783
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 30
Circular confidence region, given by single value of horizontal uncertainty (meter) 1220.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 230
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.61514
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 873989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 16:35:56

Md:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 873989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 16:35:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2009-05-21T07:00:52.33 0.6 undecidable manual Sg 234 65.6898 0.476 40
IV.PIEI.HHZ. 2009-05-21T07:00:52.48 0.1 undecidable manual Sg 174 68.2761 -0.035 88
IV.FSSB.SHZ. 2009-05-21T07:00:49.95 0.1 undecidable manual Sg 153 56.7987 0.309 85
IV.PARC.HHZ. 2009-05-21T07:00:49.56 0.1 undecidable manual Sg 197 57.9975 -0.367 84
IV.SFI.EHZ. 2009-05-21T07:00:49.30 0.1 undecidable manual Sg 241 55.2003 0.047 90
IV.VMG.SHZ. 2009-05-21T07:00:45.27 10.0 undecidable manual Pg 0 0 0
IV.ASQU.HHZ. 2009-05-21T07:00:43.05 0.1 undecidable manual Pg 234 65.6898 -0.001 89
IV.PIEI.HHZ. 2009-05-21T07:00:43.81 0.1 undecidable manual Pg 174 68.2761 0.377 83
IV.SFI.EHZ. 2009-05-21T07:00:41.41 0.1 undecidable manual Pg 241 55.2003 -0.14 89
IV.FSSB.SHZ. 2009-05-21T07:00:41.61 0.1 undecidable manual Pg 153 56.7987 -0.164 88
IV.PARC.HHZ. 2009-05-21T07:00:41.77 0.1 undecidable manual Pg 197 57.9975 -0.17 87
IV.BLLA.EHN. 2009-05-21T07:00:39.77 0.1 undecidable manual Sg 111 1.5984 -0.075 100
IV.RSM.SHZ. 2009-05-21T07:00:37.51 0.1 undecidable manual Pg 180 24.1536 -0.043 96
IV.BLLA.EHN. 2009-05-21T07:00:36.21 0.1 undecidable manual Pg 111 1.5984 0.093 98
MN.VLC.HHZ. 2009-05-21T07:00:25.00 10.0 undecidable manual Sg 0 0 0
MN.VLC.HHZ. 2009-05-21T07:00:19.73 10.0 undecidable manual Pg 0 0 0
IV.GIUL.HHE. 2009-05-21T07:00:17.20 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