Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 08-10-2021 and time 11:08:49 (Italy) in region 2 km SE Forlimpopoli (FC)

A magnitude ML 2.1 earthquake occured in region: 2 km SE Forlimpopoli (FC), on

  • 08-10-2021 09:08:49 (UTC)
  • 08-10-2021 11:08:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1800, 12.1470 at 19 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
Forlimpopoli FC 2 13290 13290
Bertinoro FC 4 11059 24349
Meldola FC 9 9970 34319
Cesena FC 9 96758 131077
Forlì FC 10 117913 248990
Castrocaro Terme e Terra del Sole FC 16 6426 255416
Predappio FC 16 6346 261762
Montiano FC 17 1716 263478
Gambettola FC 17 10660 274138
Longiano FC 19 7126 281264
Cervia RA 19 28940 310204

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km NW of Cesena (96758 inhabitants)
10 Km SE of Forlì (117913 inhabitants)
24 Km E of Faenza (58541 inhabitants)
27 Km S of Ravenna (159116 inhabitants)
36 Km W of Rimini (147750 inhabitants)
39 Km E of Imola (69797 inhabitants)
68 Km W of Pesaro (94582 inhabitants)
73 Km E of Bologna (386663 inhabitants)
79 Km W of Fano (60888 inhabitants)
82 Km N of Arezzo (99543 inhabitants)
84 Km SE of Ferrara (133155 inhabitants)
85 Km NE of Firenze (382808 inhabitants)
90 Km E of Prato (191150 inhabitants)
90 Km NE of Scandicci (50609 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 2.1 2021-10-08
09:08:49		 44.18 12.1467 19 2022-03-30
13:04:27		 Bollettino Sismico Italiano INGV 99440891
Reviewed
Rev100 		ML 2.1 2021-10-08
09:08:49		 44.1323 12.1453 6 2021-10-08
09:16:12		 Sala Sismica INGV-Roma 96343451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-08 09:08:49 ± 0.31
Latitude 44.1800 ± 0.0144
Longitude 12.1467 ± 0.0176
Depth (km) 19 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99440891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1454
Semi-minor axis of confidence ellipse (meter) 1123
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 232
Circular confidence region, given by single value of horizontal uncertainty (meter) 1450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 163
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.52
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.33010
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 38
Type of magnitude ML
Reference to an origin 99440891
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-07 16:15:56

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 41
Type of magnitude ML
Reference to an origin 96343451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-08 09:16:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OT.OT05.EHZ. 2021-10-08T09:10:26.26 3.0 undecidable manual Sn -1.74 0
IV.MSSA.HHZ. 2021-10-08T09:09:47.98 3.0 undecidable manual Sn -0.63 0
IV.POFI.HHZ. 2021-10-08T09:09:37.48 3.0 undecidable manual Pg 4.58 0
GU.RNCA.HHZ. 2021-10-08T09:09:30.89 3.0 undecidable manual Pn 2.51 0
IV.ZEN8.EHZ. 2021-10-08T09:09:23.03 3.0 negative manual Pg 1.8 0
IV.CSP1.EHZ. 2021-10-08T09:09:14.95 0.3 undecidable manual P 144 147.6411 93 1.08 43
IV.PIEI.HHZ. 2021-10-08T09:09:13.80 0.6 undecidable manual S 156 77.9664 97 0.75 39
IV.NARO.HHZ. 2021-10-08T09:09:12.66 0.6 undecidable manual S 151 72.0723 97 1.18 32
IV.EL6.EHZ. 2021-10-08T09:09:10.31 0.3 undecidable manual P 141 121.4895 94 0.46 59
IV.SEI.HHZ. 2021-10-08T09:09:10.89 0.6 undecidable manual S 258 64.2912 98 1.46 29
IV.PE3.EHZ. 2021-10-08T09:09:09.98 0.6 undecidable manual S 152 60.495 99 1.54 27
IV.RUFI.EHZ. 2021-10-08T09:09:09.54 0.6 undecidable manual S 233 63.3921 99 0.33 46
IV.PARC.HHZ. 2021-10-08T09:09:08.30 0.6 undecidable manual S 173 59.3961 99 0.15 48
IV.ASQU.HHE. 2021-10-08T09:09:06.07 0.6 undecidable manual S 214 51.2154 101 0.08 50
IV.IMOL.EHZ. 2021-10-08T09:09:04.89 0.6 undecidable manual S 302 37.7289 106 2.38 14
IV.FRON.EHZ. 2021-10-08T09:09:04.33 0.3 undecidable manual P 148 86.8464 96 -0.2 67
IV.SFI.EHZ. 2021-10-08T09:09:02.50 0.3 undecidable manual S 218 38.7279 106 -0.26 72
IV.LMD.HHZ. 2021-10-08T09:09:02.30 0.6 undecidable manual S 252 36.8298 107 0.05 51
IV.PIEI.HHZ. 2021-10-08T09:09:02.45 0.3 undecidable manual P 156 77.9664 97 -0.72 59
IV.BRIS.HHZ. 2021-10-08T09:09:01.30 0.6 undecidable manual S 279 30.6471 111 0.6 46
IV.MTRZ.HNN. 2021-10-08T09:09:01.56 0.3 undecidable manual P 285 59.1963 99 1.25 48
IV.NARO.HHZ. 2021-10-08T09:09:01.84 0.3 undecidable manual P 151 72.0723 97 -0.42 66
IV.RUFI.EHZ. 2021-10-08T09:09:00.20 0.3 undecidable manual P 233 63.3921 99 -0.75 59
IV.PE3.EHZ. 2021-10-08T09:09:00.36 0.3 undecidable manual P 152 60.495 99 -0.15 71
IV.SEI.HHZ. 2021-10-08T09:09:00.78 0.6 undecidable manual P 258 64.2912 98 -0.3 46
IV.PARC.HHZ. 2021-10-08T09:08:59.68 0.3 undecidable manual P 173 59.3961 99 -0.66 62
IV.VISG.HHZ. 2021-10-08T09:08:59.73 0.3 undecidable manual P 271 56.6988 100 -0.19 71
IV.ASQU.HHE. 2021-10-08T09:08:58.49 0.1 undecidable manual P 214 51.2154 101 -0.6 85
IV.IMOL.EHZ. 2021-10-08T09:08:58.32 0.3 undecidable manual P 302 37.7289 106 1.24 50
IV.RSM2.HHE. 2021-10-08T09:08:57.01 0.3 undecidable manual P 138 35.9418 108 0.21 74
IV.SFI.EHZ. 2021-10-08T09:08:56.50 0.1 undecidable manual P 218 38.7279 106 -0.73 83
IV.BRSN.HNZ. 2021-10-08T09:08:56.90 0.6 undecidable manual S 335 12.6762 140 0.16 52
IV.LMD.HHZ. 2021-10-08T09:08:56.32 0.3 undecidable manual P 252 36.8298 107 -0.62 65
IV.BRIS.HHZ. 2021-10-08T09:08:55.88 0.1 undecidable manual P 279 30.6471 111 -0.16 100
IV.BRSN.HNZ. 2021-10-08T09:08:53.05 0.1 undecidable manual P 335 12.6762 140 -0.7 89
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHE. ML:1.3 0.0000391981588 1.4784 AML other m 2021-10-08T09:08:36.14
IV.BRSN.HNN. ML:2.4 0.0017871189000000002 0.1984 AML other m 2021-10-08T09:08:57.12
IV.BRSN.EHN. ML:2.4 0.00180417085 0.1984 AML other m 2021-10-08T09:08:57.12
IV.BRIS.HNN. ML:1.7 0.00018789905000000001 0.7232 AML other m 2021-10-08T09:08:57.16
IV.BRSN.EHE. ML:2.5 0.00212 0.26 AML other m 2021-10-08T09:08:57.13
IV.BRSN.HNE. ML:2.5 0.0024213245 0.2816 AML other m 2021-10-08T09:08:57.14
IV.BRIS.HNE. ML:1.4 0.00011573522 0.6272 AML other m 2021-10-08T09:08:58.39
IV.RUFI.EHE. ML:1.1 0.000025227134999999997 0.4416 AML other m 2021-10-08T09:09:00.26
IV.PE3.EHE. ML:2.2 0.00028537165 1.0368 AML other m 2021-10-08T09:09:02.43
IV.LMD.HHE. ML:2.2 0.0005312552000000001 0.16 AML other m 2021-10-08T09:09:04.04
IV.SFI.HNE. ML:2.2 0.00045806045000000003 0.352 AML other m 2021-10-08T09:09:04.35
IV.SFI.EHE. ML:2.0 0.0003222432 0.3392 AML other m 2021-10-08T09:09:04.53
IV.SFI.HNN. ML:2.1 0.00040974175 0.1728 AML other m 2021-10-08T09:09:04.47
IV.SFI.EHN. ML:2.0 0.000359 0.16 AML other m 2021-10-08T09:09:04.48
IV.BRIS.HHE. ML:2.1 0.00051504975 0.256 AML other m 2021-10-08T09:09:05.18
IV.IMOL.HNE. ML:2.3 0.00070961835 0.2112 AML other m 2021-10-08T09:09:07.29
IV.BRIS.HHN. ML:2.0 0.00045165069999999997 0.4224 AML other m 2021-10-08T09:09:08.84
IV.VISG.HHN. ML:1.4 0.00005796716000000001 0.1344 AML other m 2021-10-08T09:09:09.46
IV.VISG.HHE. ML:1.3 0.00004594437 0.2624 AML other m 2021-10-08T09:09:09.97
IV.RUFI.EHN. ML:1.8 0.00012428385 0.2752 AML other m 2021-10-08T09:09:12.48
IV.NARO.HHE. ML:1.5 0.000050180775 1.7824 AML other m 2021-10-08T09:09:13.96
IV.PE3.EHN. ML:2.0 0.00021196425 0.3968 AML other m 2021-10-08T09:09:14.30
IV.PIEI.HHE. ML:1.9 0.0001184724 0.2176 AML other m 2021-10-08T09:09:14.61
IV.LMD.HHN. ML:3.2 0.004891439 0.416 AML other m 2021-10-08T09:09:14.73
IV.PIEI.HHN. ML:1.8 0.000078380755 0.2816 AML other m 2021-10-08T09:09:14.76
IV.NARO.HHN. ML:1.7 0.00007003198 0.1408 AML other m 2021-10-08T09:09:15.57
IV.FRON.EHN. ML:1.9 0.00009441728 1.52 AML other m 2021-10-08T09:09:17.86
IV.IMOL.HNN. ML:2.4 0.0008080441000000001 0.0576 AML other m 2021-10-08T09:09:20.39
IV.PARC.HHN. ML:1.7 0.00009112462 1.0784 AML other m 2021-10-08T09:09:20.71
IV.ZEN8.HNE. ML:2.5 0.00010060796 1.5712 AML other m 2021-10-08T09:09:23.15
IV.ZEN8.EHE. ML:2.0 0.00003037303 0.0576 AML other m 2021-10-08T09:09:27.73
IV.FRON.EHE. ML:1.9 0.00009550348999999999 1.0016 AML other m 2021-10-08T09:09:27.96
IV.CSP1.EHE. ML:2.8 0.00035970409999999995 0.0992 AML other m 2021-10-08T09:09:28.59
IV.EL6.EHN. ML:2.6 0.00025654569999999997 0.2592 AML other m 2021-10-08T09:09:31.30
IV.EL6.EHE. ML:2.6 0.0002573409 0.0032 AML other m 2021-10-08T09:09:37.48
IV.ZEN8.EHN. ML:2.1 0.000035009885 0.5376 AML other m 2021-10-08T09:09:47.50
IV.ZEN8.HNN. ML:2.7 0.00016078850000000001 0.9408 AML other m 2021-10-08T09:09:57.08
IV.CSP1.EHN. ML:2.8 0.00031182755 0.2592 AML other m 2021-10-08T09:09:59.62
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