Earthquake 5 km E Marradi (FI), Magnitude ML 2.1, 21 September 2023 time 05:05:12 (Timezone Italy)

A magnitude ML 2.1 earthquake occured in region: 5 km E Marradi (FI), on

21-09-2023 03:05:12 (UTC)
21-09-2023 05:05:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0610, 11.6740 at 6 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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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Display location by

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).

Municipality	Region	Distance (km)	Inhabitants	Cumulative Inhabitants
Marradi	FI	5	3139	3139
Tredozio	FC	6	1212	4351
Portico e San Benedetto	FC	9	756	5107
Palazzuolo sul Senio	FI	12	1154	6261
Premilcuore	FC	12	799	7060
Rocca San Casciano	FC	14	1910	8970
Modigliana	FC	14	4560	13530
San Godenzo	FI	16	1167	14697
Dovadola	FC	18	1653	16350
Casola Valsenio	RA	19	2617	18967
Brisighella	RA	20	7639	26606

Municipalities with at least 50000 inhabitants

An earthquake occurred to

30 Km SW of Faenza (58541 inhabitants)

33 Km S of Imola (69797 inhabitants)

34 Km SW of Forlì (117913 inhabitants)

46 Km W of Cesena (96758 inhabitants)

47 Km NE of Firenze (382808 inhabitants)

50 Km E of Prato (191150 inhabitants)

52 Km NE of Scandicci (50609 inhabitants)

55 Km SE of Bologna (386663 inhabitants)

58 Km SW of Ravenna (159116 inhabitants)

62 Km E of Pistoia (90315 inhabitants)

68 Km N of Arezzo (99543 inhabitants)

71 Km W of Rimini (147750 inhabitants)

86 Km S of Ferrara (133155 inhabitants)

87 Km NE of Siena (53903 inhabitants)

88 Km SE of Modena (184973 inhabitants)

97 Km E of Lucca (89046 inhabitants)

Recent and historical seismicity

Not available maps for this sismic event.

Seismic hazard

Not available maps for this sismic event.

Shakemap

Not available maps for this sismic event.

Felt maps

Not available maps for this sismic event.

Locations history

Type	Magnitude	Date and Time (UTC)	Latitude	Longitude	Depth (km)	Published time (UTC)	Author	Location ID
Reviewed Rev100	ML 2.1	2023-09-21 03:05:12	44.0607	11.6745	6	2023-09-21 04:25:24	Sala Sismica INGV-Roma	121295991

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2023-09-21 03:05:12 ± 0.12
Latitude	44.0607 ± 0.0063
Longitude	11.6745 ± 0.0075
Depth (km)	6 ± 1 (from location)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	100 -> SURVEY-INGV
Event type	earthquake
Origin ID	121295991

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	542
Semi-minor axis of confidence ellipse (meter)	528
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	28
Circular confidence region, given by single value of horizontal uncertainty (meter)	540.0
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	80
Number of associated phases, regardless of their use for origin computation	43
Number of defining phases	39
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.4
Epicentral distance of station closest to the epicenter (degree)	0.00000
Epicentral distance of station farthest from the epicenter (degree)	0.80489
Number of stations at which the event was observed	25
Number of stations from which data was used for origin computation	21

Magnitude information

ML:2.1

Field	Value
Value	2.1
Uncertainty	0.3
Num. used stations	42
Type of magnitude	ML
Reference to an origin	121295991
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2023-09-21 04:25:24

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Takeoff_angle	Residual	Weight
IV.FIAM.HHZ.	2023-09-21T03:06:15.30	3.0	undecidable	manual	Sn				1.85	0
MN.TRI.HHZ.	2023-09-21T03:05:54.66	3.0	undecidable	manual	Pg				6.22	0
IV.ATPI.EHZ.	2023-09-21T03:05:40.54	0.3	undecidable	manual	S	139	89.3439	50	0.86	53
IV.ASSB.HHZ.	2023-09-21T03:05:37.58	3.0	undecidable	manual	P				2.55	0
IV.ARCI.HHZ.	2023-09-21T03:05:36.47	3.0	undecidable	manual	P				1.81	0
GU.POPM.HHZ.	2023-09-21T03:05:35.86	0.6	undecidable	manual	S	269	73.1712	50	0.49	42
IV.OSSC.HHZ.	2023-09-21T03:05:34.23	0.6	undecidable	manual	S	210	68.7756	50	0.04	47
IV.PARC.HHZ.	2023-09-21T03:05:33.22	0.6	undecidable	manual	S	135	64.1913	50	0.24	45
IV.CRMI.HHZ.	2023-09-21T03:05:32.23	0.6	undecidable	manual	S	242	62.7927	50	-0.37	44
IV.CRE.HHZ.	2023-09-21T03:05:29.81	0.6	undecidable	manual	S	156	53.8017	50	-0.38	45
IV.FNVD.HHZ.	2023-09-21T03:05:27.55	0.6	undecidable	manual	S	285	45.5211	50	-0.43	45
IV.ATPI.EHZ.	2023-09-21T03:05:27.51	1.0	negative	manual	P	139	89.3439	50	-0.56	20
GU.POPM.HHZ.	2023-09-21T03:05:27.16	0.6	positive	manual	P	269	73.1712	50	1.58	25
IV.CAFI.HHZ.	2023-09-21T03:05:27.20	0.6	negative	manual	P	164	84.4488	50	-0.12	44
IV.IMOL.EHZ.	2023-09-21T03:05:26.20	0.6	undecidable	manual	S	9	33.5442	100	2.16	17
IV.MOCL.EHZ.	2023-09-21T03:05:25.74	0.6	undecidable	manual	S	261	39.8268	98	-0.45	45
IV.MTRZ.HHZ.	2023-09-21T03:05:25.65	0.3	undecidable	manual	S	325	34.3434	100	1.36	45
IV.OSSC.HHZ.	2023-09-21T03:05:25.75	0.1	undecidable	manual	P	210	68.7756	50	0.85	73
IV.CSNT.HHZ.	2023-09-21T03:05:24.54	1.0	undecidable	manual	P	205	72.0723	50	-0.87	18
IV.PARC.HHZ.	2023-09-21T03:05:23.56	0.6	positive	manual	P	135	64.1913	50	-0.64	40
IV.CRMI.HHZ.	2023-09-21T03:05:23.90	1.0	undecidable	manual	P	242	62.7927	50	-0.09	23
IV.BOSL.HHZ.	2023-09-21T03:05:22.37	0.6	undecidable	manual	S	239	27.9498	102	0.25	48
IV.RUFI.EHZ.	2023-09-21T03:05:22.33	0.6	undecidable	manual	S	208	27.9498	102	0.19	49
IV.CRE.HHZ.	2023-09-21T03:05:21.78	0.3	negative	manual	P	156	53.8017	50	-0.81	57
IV.SEI.HHZ.	2023-09-21T03:05:21.15	0.6	undecidable	manual	S	268	25.1526	103	-0.04	50
IV.MPPT.EHZ.	2023-09-21T03:05:21.06	1.0	undecidable	manual	P	256	48.0186	50	-0.64	21
IV.SFI.EHZ.	2023-09-21T03:05:20.56	0.6	undecidable	manual	S	141	22.0668	105	0.41	47
IV.VISG.HHZ.	2023-09-21T03:05:20.53	0.6	undecidable	manual	S	307	23.8539	104	-0.2	49
IV.FNVD.HHZ.	2023-09-21T03:05:20.65	0.3	positive	manual	P	285	45.5211	50	-0.67	62
IV.IMOL.EHZ.	2023-09-21T03:05:19.38	1.0	positive	manual	P	9	33.5442	100	0.34	23
IV.MOCL.EHZ.	2023-09-21T03:05:19.22	1.0	negative	manual	P	261	39.8268	98	-1.06	18
IV.RINC.EHZ.	2023-09-21T03:05:19.88	0.6	undecidable	manual	S	196	20.0688	106	0.41	47
IV.MTRZ.HHZ.	2023-09-21T03:05:19.24	0.3	positive	manual	P	325	34.3434	100	0.06	74
IV.VMGN.HHZ.	2023-09-21T03:05:18.88	0.6	undecidable	manual	S	224	16.3725	110	0.65	44
IV.RUFI.EHZ.	2023-09-21T03:05:17.71	0.1	positive	manual	P	208	27.9498	102	-0.23	96
IV.BOSL.HHZ.	2023-09-21T03:05:17.81	0.6	positive	manual	P	239	27.9498	102	-0.12	49
IV.SEI.HHZ.	2023-09-21T03:05:17.07	0.1	undecidable	manual	P	268	25.1526	103	-0.32	95
IV.RINC.EHZ.	2023-09-21T03:05:16.52	0.1	positive	manual	P	196	20.0688	106	0.12	100
IV.SFI.EHZ.	2023-09-21T03:05:16.69	0.1	positive	manual	P	141	22.0668	105	-0.1	100
IV.VISG.HHZ.	2023-09-21T03:05:16.75	0.3	undecidable	manual	P	307	23.8539	104	-0.38	71
IV.VMGN.HHZ.	2023-09-21T03:05:15.92	0.1	positive	manual	P	224	16.3725	110	0.23	98
IV.LMD.HHZ.	2023-09-21T03:05:14.10	0.6	undecidable	manual	S	55	3.1968	151	-0.43	48
IV.LMD.HHZ.	2023-09-21T03:05:13.23	0.1	undecidable	manual	P	55	3.1968	151	-0.32	99

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.VMGN.HHE.	ML:2.2	0.001435	1.12	AML	other	m	2023-09-21T03:05:19.35
IV.VMGN.HHN.	ML:2.1	0.001193	1.32	AML	other	m	2023-09-21T03:05:19.23
IV.RINC.EHN.	ML:2.1	0.00106	0.26	AML	other	m	2023-09-21T03:05:20.31
IV.SFI.HNE.	ML:2.3	0.001335	0.36	AML	other	m	2023-09-21T03:05:20.53
IV.SFI.EHE.	ML:2.3	0.00136	0.34	AML	other	m	2023-09-21T03:05:20.54
IV.VISG.HHN.	ML:2.1	0.000944	0.82	AML	other	m	2023-09-21T03:05:20.91
IV.SFI.HNN.	ML:2.2	0.001265	1.6	AML	other	m	2023-09-21T03:05:21.10
IV.SFI.EHN.	ML:2.2	0.001245	1.58	AML	other	m	2023-09-21T03:05:21.11
IV.VISG.HHE.	ML:2.0	0.0006575	0.42	AML	other	m	2023-09-21T03:05:21.32
IV.RINC.EHE.	ML:2.2	0.00117	0.24	AML	other	m	2023-09-21T03:05:21.57
IV.RUFI.EHE.	ML:1.7	0.00026700000000000004	0.82	AML	other	m	2023-09-21T03:05:22.24
IV.RUFI.EHN.	ML:2.2	0.0008215	0.38	AML	other	m	2023-09-21T03:05:22.49
IV.BOSL.HHN.	ML:1.9	0.000399	0.38	AML	other	m	2023-09-21T03:05:22.65
IV.SEI.HHN.	ML:2.7	0.00318	1.52	AML	other	m	2023-09-21T03:05:23.07
IV.SEI.HHE.	ML:2.4	0.0015099999999999998	0.8	AML	other	m	2023-09-21T03:05:23.55
IV.BOSL.HHE.	ML:1.7	0.0002855	0.24	AML	other	m	2023-09-21T03:05:24.39
IV.MOCL.EHN.	ML:2.2	0.0005645	0.34	AML	other	m	2023-09-21T03:05:26.10
IV.IMOL.HNN.	ML:2.5	0.00146	0.24	AML	other	m	2023-09-21T03:05:27.06
IV.MOCL.EHE.	ML:2.0	0.0003305	0.84	AML	other	m	2023-09-21T03:05:27.52
IV.IMOL.HNE.	ML:2.4	0.0012900000000000001	0.22	AML	other	m	2023-09-21T03:05:27.28
IV.MTRZ.HNN.	ML:2.6	0.0018549999999999999	0.46	AML	other	m	2023-09-21T03:05:27.57
IV.MTRZ.HHN.	ML:2.6	0.0019450000000000001	0.46	AML	other	m	2023-09-21T03:05:27.57
IV.FNVD.HHE.	ML:2.0	0.0003125	0.36	AML	other	m	2023-09-21T03:05:28.31
IV.MTRZ.HHE.	ML:2.5	0.0013599999999999999	0.36	AML	other	m	2023-09-21T03:05:28.65
IV.MTRZ.HNE.	ML:2.4	0.0012400000000000002	0.36	AML	other	m	2023-09-21T03:05:28.65
IV.MPPT.EHE.	ML:1.7	0.0001315	0.56	AML	other	m	2023-09-21T03:05:29.62
IV.MPPT.EHN.	ML:1.7	0.00013550000000000001	0.86	AML	other	m	2023-09-21T03:05:29.28
IV.FNVD.HHN.	ML:1.5	0.00010339999999999999	0.82	AML	other	m	2023-09-21T03:05:29.33
IV.CRE.HHN.	ML:2.5	0.0007050000000000001	0.2	AML	other	m	2023-09-21T03:05:30.23
IV.CRE.HHE.	ML:2.2	0.0004145	0.2	AML	other	m	2023-09-21T03:05:30.30
IV.CRMI.HHN.	ML:2.0	0.000217	0.44	AML	other	m	2023-09-21T03:05:32.91
IV.CRMI.HHE.	ML:1.6	0.00007405000000000001	0.86	AML	other	m	2023-09-21T03:05:34.26
IV.OSSC.HHN.	ML:2.0	0.000154	0.24	AML	other	m	2023-09-21T03:05:35.07
IV.PARC.HHE.	ML:1.8	0.00012855	0.58	AML	other	m	2023-09-21T03:05:36.67
IV.PARC.HHN.	ML:1.9	0.000157	1.34	AML	other	m	2023-09-21T03:05:37.00
IV.OSSC.HHE.	ML:2.3	0.00033350000000000003	0.48	AML	other	m	2023-09-21T03:05:37.72
IV.CSNT.HHE.	ML:2.0	0.000174	1.56	AML	other	m	2023-09-21T03:05:41.88
IV.CAFI.HHN.	ML:2.0	0.00011399999999999999	1.26	AML	other	m	2023-09-21T03:05:42.22
IV.CAFI.HHE.	ML:2.1	0.00017449999999999999	1.46	AML	other	m	2023-09-21T03:05:43.73
IV.CSNT.HHN.	ML:2.1	0.0001915	0.62	AML	other	m	2023-09-21T03:05:43.99
IV.ATPI.EHE.	ML:1.9	0.00008765	0.72	AML	other	m	2023-09-21T03:05:45.13
IV.ATPI.EHN.	ML:2.0	0.00010525000000000001	0.48	AML	other	m	2023-09-21T03:05:45.53

TDMT - Time Domain Moment Tensor

Not available TDMT solution for this seismic event.

Fault Plane solutions in the area

Not available maps for this sismic event.

Download

Type	Description	Link
QuakeML - small	Event, Origin, FocalMechanism	Download
QuakeML - full	Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude	Download

Earthquake with magnitude of ML 2.1 on date 21-09-2023 and time 05:05:12 (Italy) in region 5 km E Marradi (FI)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:2.1