Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 21-01-2021 and time 04:21:31 (UTC) in region 5 km SE Fiordimonte (MC)

A magnitude ML 1.3 earthquake occured in region: 5 km SE Fiordimonte (MC), on

  • 21-01-2021 04:21:31 (UTC)
  • 21-01-2021 05:21:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9940, 13.1200 at 9 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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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Fiordimonte MC 6 202 202
Ussita MC 6 444 646
Fiastra MC 6 559 1205
Acquacanina MC 6 121 1326
Visso MC 7 1107 2433
Pieve Torina MC 8 1458 3891
Pievebovigliana MC 8 866 4757
Bolognola MC 9 142 4899
Monte Cavallo MC 10 145 5044
Castelsantangelo sul Nera MC 11 281 5325
Muccia MC 12 915 6240
Preci PG 14 724 6964
Sarnano MC 16 3264 10228
Serravalle di Chienti MC 16 1070 11298
Camerino MC 16 6974 18272
Cessapalombo MC 17 512 18784
Caldarola MC 18 1823 20607
Montefortino FM 19 1178 21785
Amandola FM 19 3629 25414
Sellano PG 19 1079 26493
Camporotondo di Fiastrone MC 20 563 27056
Gualdo MC 20 815 27871
Montemonaco AP 20 604 28475

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
61 Km NW of Teramo (54892 inhabitants)
61 Km E of Perugia (166134 inhabitants)
62 Km NE of Terni (111501 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
95 Km S of Fano (60888 inhabitants)
100 Km NW of Montesilvano (53738 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
Reviewed
Rev100 		ML 1.3 2021-01-21
04:21:31		 42.9937 13.1198 9 2021-01-21
05:26:57		 Sala Sismica INGV-Roma 86420561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-21 04:21:31 ± 0.08
Latitude 42.9937 ± 0.0054
Longitude 13.1198 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86420561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 556
Semi-minor axis of confidence ellipse (meter) 310
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 10
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.15738
Epicentral distance of station farthest from the epicenter (degree) 0.52071
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 86420561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-21 05:26:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-01-21T04:21:50.32 0.6 undecidable manual S 346 57.7977 50 0.6 41
IV.TERO.HHZ. 2021-01-21T04:21:49.97 0.6 undecidable manual S 136 56.9985 50 0.47 43
IV.ASSB.HHZ. 2021-01-21T04:21:44.36 0.3 undecidable manual S 278 37.8288 50 -0.03 73
IV.GAVE.EHZ. 2021-01-21T04:21:44.67 0.3 undecidable manual S 209 38.1285 50 0.19 70
IV.EL6.EHZ. 2021-01-21T04:21:43.83 0.3 undecidable manual S 358 37.2294 50 -0.41 67
IV.SAP2.EHZ. 2021-01-21T04:21:41.51 0.6 undecidable manual S 63 25.3524 110 0.76 41
IV.TERO.HHZ. 2021-01-21T04:21:41.57 0.6 undecidable manual P 136 56.9985 50 -0.28 45
IV.MF5.EHZ. 2021-01-21T04:21:41.86 0.6 undecidable manual S 91 27.5502 108 0.38 46
IV.ARVD.HHZ. 2021-01-21T04:21:41.18 1.0 undecidable manual P 346 57.7977 50 -0.8 19
IV.MNTT.EHZ. 2021-01-21T04:21:39.49 0.6 negative manual P 79 39.3273 50 0.36 45
IV.GAVE.EHZ. 2021-01-21T04:21:38.90 1.0 positive manual P 209 38.1285 50 -0.05 24
IV.MTRA.EHZ. 2021-01-21T04:21:38.33 1.0 undecidable manual P 139 34.6431 50 -0.08 24
IV.MMO1.EHZ. 2021-01-21T04:21:38.67 0.3 undecidable manual S 122 19.7691 115 -0.29 71
IV.CESI.HHZ. 2021-01-21T04:21:38.60 0.6 undecidable manual S 274 17.4714 117 0.35 47
IV.GUMA.HHZ. 2021-01-21T04:21:38.63 0.6 undecidable manual S 66 19.0698 116 -0.1 49
IV.ASSB.HHZ. 2021-01-21T04:21:38.82 0.6 positive manual P 278 37.8288 50 -0.08 48
IV.MF5.EHZ. 2021-01-21T04:21:37.16 1.0 positive manual P 91 27.5502 108 -0.06 25
IV.EL6.EHZ. 2021-01-21T04:21:37.89 1.0 undecidable manual P 358 37.2294 50 -0.93 18
IV.SAP2.EHZ. 2021-01-21T04:21:36.83 0.6 positive manual P 63 25.3524 110 0.03 50
IV.NRCA.HHZ. 2021-01-21T04:21:35.28 0.6 negative manual P 181 17.7711 117 -0.12 49
IV.GUMA.HHZ. 2021-01-21T04:21:35.51 0.6 positive manual P 66 19.0698 116 -0.12 49
IV.MMO1.EHZ. 2021-01-21T04:21:35.41 0.3 positive manual P 122 19.7691 115 -0.36 70
IV.CESI.HHZ. 2021-01-21T04:21:35.42 0.1 positive manual P 274 17.4714 117 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.3 0.0001585 0.28 AML other m 2021-01-21T04:21:38.69
IV.CESI.HHE. ML:1.3 0.00017299999999999998 0.46 AML other m 2021-01-21T04:21:38.79
IV.GUMA.HHE. ML:1.4 0.00020150000000000002 0.3 AML other m 2021-01-21T04:21:39.08
IV.NRCA.HHN. ML:1.4 0.0002285 0.16 AML other m 2021-01-21T04:21:40.34
IV.NRCA.HHE. ML:1.4 0.00019250000000000002 0.9 AML other m 2021-01-21T04:21:41.54
IV.SAP2.EHE. ML:1.1 0.000074 0.14 AML other m 2021-01-21T04:21:41.85
IV.SAP2.EHN. ML:1.8 0.0004195 0.34 AML other m 2021-01-21T04:21:43.82
IV.TERO.HHN. ML:1.0 0.00002685 1.58 AML other m 2021-01-21T04:21:43.82
IV.GUMA.HHN. ML:1.4 0.000214 0.96 AML other m 2021-01-21T04:21:44.73
IV.ASSB.HHN. ML:1.3 0.00007869999999999999 0.46 AML other m 2021-01-21T04:21:44.46
IV.ASSB.HHE. ML:1.4 0.00008665 0.3 AML other m 2021-01-21T04:21:44.60
IV.GAVE.EHE. ML:1.2 0.000058899999999999995 1.58 AML other m 2021-01-21T04:21:45.16
IV.GAVE.EHN. ML:1.3 0.00007455000000000001 0.26 AML other m 2021-01-21T04:21:46.62
IV.TERO.HHE. ML:1.0 0.0000195 0.9 AML other m 2021-01-21T04:21:49.54
IV.MTRA.EHE. ML:1.5 0.0001283 0.92 AML other m 2021-01-21T04:21:56.68
IV.MTRA.EHN. ML:1.3 0.00008405000000000001 0.9 AML other m 2021-01-21T04:21:56.36
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