Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 05-12-2021 and time 14:22:25 (UTC) in region Costa Romagnola meridionale (Rimini, Forli Cesena)

A magnitude ML 1.5 earthquake occured in region: Costa Romagnola meridionale (Rimini, Forli Cesena), on

  • 05-12-2021 14:22:25 (UTC)
  • 05-12-2021 15:22:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1270, 12.6640 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
Rimini RN 11 147750 147750
Riccione RN 14 34965 182715
Bellaria-Igea Marina RN 17 19519 202234
Misano Adriatico RN 17 13014 215248
Santarcangelo di Romagna RN 19 22089 237337
Coriano RN 19 10502 247839
Gabicce Mare PU 19 5781 253620
Cattolica RN 19 17125 270745
San Mauro Pascoli FC 20 11690 282435

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km NE of Rimini (147750 inhabitants)
31 Km NW of Pesaro (94582 inhabitants)
34 Km E of Cesena (96758 inhabitants)
43 Km NW of Fano (60888 inhabitants)
49 Km SE of Ravenna (159116 inhabitants)
51 Km E of Forlì (117913 inhabitants)
65 Km E of Faenza (58541 inhabitants)
80 Km E of Imola (69797 inhabitants)
89 Km NW of Ancona (100861 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 		ML 1.5 2021-12-05
14:22:25		 44.127 12.6637 30 2022-03-30
13:04:32		 Bollettino Sismico Italiano INGV 100273941
Reviewed
Rev100 		ML 1.4 2021-12-05
14:22:26		 44.099 12.6593 28 2021-12-05
14:30:13		 Sala Sismica INGV-Roma 98180291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-05 14:22:25 ± 0.39
Latitude 44.1270 ± 0.0144
Longitude 12.6637 ± 0.0188
Depth (km) 30 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100273941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1501
Semi-minor axis of confidence ellipse (meter) 1171
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 1500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 229
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 22
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) 0.72216
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 100273941
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-28 15:02:19

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 98180291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-05 14:30:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.SCL3.EHZ.02 2021-12-05T14:24:24.59 3.0 undecidable manual Sg 9.17 0
OT.OT13.EHZ. 2021-12-05T14:24:09.79 3.0 undecidable manual Sg 9.68 0
IX.SRN3.HHZ.02 2021-12-05T14:24:08.29 3.0 undecidable manual Sn -9.99 0
IX.RSF3.HHZ.02 2021-12-05T14:23:58.94 3.0 undecidable manual Sn -7.7 0
IV.BSSO.HHZ. 2021-12-05T14:23:57.82 3.0 undecidable manual Sg 8.75 0
OT.OT17.EHZ. 2021-12-05T14:23:44.35 3.0 undecidable manual Sn -9.37 0
IV.CDRU.HHZ. 2021-12-05T14:23:30.18 3.0 undecidable manual Pn 1.85 0
IV.ZEN8.EHZ. 2021-12-05T14:23:29.54 3.0 undecidable manual Sg 5.44 0
GU.CIRO.HHZ. 2021-12-05T14:23:25.29 3.0 negative manual Pn 1.11 0
IX.RSF3.HHZ.02 2021-12-05T14:23:24.27 3.0 undecidable manual Pn 2.33 0
IV.STAL.HHZ. 2021-12-05T14:23:23.36 3.0 undecidable manual Sn -2.16 0
IV.VBKN.HHZ. 2021-12-05T14:23:21.27 3.0 undecidable manual Pn 0.88 0
IV.MTMR.EHZ. 2021-12-05T14:23:15.87 3.0 positive manual Pn -5.79 0
IV.RIBO.EHZ.01 2021-12-05T14:23:15.75 3.0 undecidable manual Sn -2.16 0
IV.MNTT.EHZ. 2021-12-05T14:23:09.32 3.0 undecidable manual Sg 1.42 0
OX.CIMO.HHZ. 2021-12-05T14:23:07.91 3.0 undecidable manual Pg 8.27 0
IV.FERS.EHZ. 2021-12-05T14:23:04.62 3.0 undecidable manual Sg 2.95 0
IV.CRE.HHE. 2021-12-05T14:22:50.40 0.6 undecidable manual S 226 80.1642 106 0.36 44
IV.ATPI.EHZ. 2021-12-05T14:22:50.72 0.6 undecidable manual S 196 77.8665 106 1.25 31
IV.IMOL.HNZ. 2021-12-05T14:22:49.15 3.0 undecidable manual Sn -0.38 0
IV.ASQU.HHE. 2021-12-05T14:22:49.86 1.0 undecidable manual S 243 78.8655 106 0.15 23
IV.PIEI.HHZ. 2021-12-05T14:22:47.13 0.6 undecidable manual S 189 66.378 109 0.59 42
IV.PARC.HHE. 2021-12-05T14:22:45.92 0.6 undecidable manual S 213 62.9925 110 0.23 46
IV.NARO.HHZ. 2021-12-05T14:22:44.34 0.6 undecidable manual S 187 57.5979 112 -0.02 48
IV.MPAG.EHZ. 2021-12-05T14:22:44.19 0.3 undecidable manual S 172 55.6998 113 0.3 69
IV.EL6.EHZ. 2021-12-05T14:22:43.79 3.0 undecidable manual Pg 0.73 0
IV.ATPI.EHZ. 2021-12-05T14:22:39.33 0.3 undecidable manual P 196 77.8665 106 -0.01 70
IV.CRE.HHE. 2021-12-05T14:22:39.54 0.3 undecidable manual P 226 80.1642 106 -0.12 68
IV.ASQU.HHE. 2021-12-05T14:22:39.35 0.3 undecidable manual P 243 78.8655 106 -0.12 68
IV.PIEI.HHZ. 2021-12-05T14:22:37.30 0.3 undecidable manual P 189 66.378 109 -0.34 66
IV.RSM2.HHE. 2021-12-05T14:22:36.37 0.6 undecidable manual S 220 27.2505 134 -1.09 35
IV.PESA.HHZ. 2021-12-05T14:22:36.80 0.6 undecidable manual S 146 24.9528 137 -0.23 49
IV.PARC.HHE. 2021-12-05T14:22:36.72 0.3 undecidable manual P 213 62.9925 110 -0.44 65
IV.NARO.HHZ. 2021-12-05T14:22:36.08 0.1 undecidable manual P 187 57.5979 112 -0.31 91
IV.CPGN.EHZ. 2021-12-05T14:22:35.21 0.3 undecidable manual P 217 45.3213 118 0.54 66
IV.BLLA.EHZ. 2021-12-05T14:22:35.51 0.3 undecidable manual S 277 15.4734 150 0 78
IV.MPAG.EHZ. 2021-12-05T14:22:35.94 0.3 undecidable manual P 172 55.6998 113 -0.17 70
IV.PE3.EHZ. 2021-12-05T14:22:35.27 0.1 undecidable manual P 196 49.617 116 0.01 98
IV.BLLA.EHZ. 2021-12-05T14:22:32.28 0.1 undecidable manual P 277 15.4734 150 1.01 74
IV.RSM2.HHE. 2021-12-05T14:22:31.25 0.3 undecidable manual P 220 27.2505 134 -1.15 52
IV.PESA.HHZ. 2021-12-05T14:22:31.99 0.1 undecidable manual P 146 24.9528 137 -0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PESA.HHE. ML:1.8 0.000229540525 0.1408 AML other m 2021-12-05T14:22:37.54
IV.PESA.HHN. ML:1.8 0.0002325771 0.0832 AML other m 2021-12-05T14:22:37.80
IV.NARO.HHE. ML:1.3 0.000034738795 0.1216 AML other m 2021-12-05T14:22:44.85
IV.NARO.HHN. ML:1.1 0.000025202660000000002 0.1216 AML other m 2021-12-05T14:22:45.74
IV.MPAG.EHE. ML:1.5 0.00006161701999999999 0.1536 AML other m 2021-12-05T14:22:45.88
IV.MPAG.EHN. ML:1.4 0.000045158829999999994 0.4992 AML other m 2021-12-05T14:22:47.22
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