Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 04-01-2021 and time 12:49:48 (UTC) in region 1 km SW Serra Sant'Abbondio (PU)

A magnitude ML 0.5 earthquake occured in region: 1 km SW Serra Sant'Abbondio (PU), on

  • 04-01-2021 12:49:48 (UTC)
  • 04-01-2021 13:49:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4800, 12.7660 at 15 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
Serra Sant'Abbondio PU 1 1027 1027
Frontone PU 5 1300 2327
Sassoferrato AN 9 7285 9612
Pergola PU 11 6333 15945
Cantiano PU 11 2245 18190
Scheggia e Pascelupo PG 12 1393 19583
Cagli PU 12 8731 28314
Costacciaro PG 14 1216 29530
Arcevia AN 14 4612 34142
Genga AN 15 1797 35939
Sigillo PG 17 2404 38343
Acqualagna PU 17 4393 42736
Fabriano AN 20 31480 74216

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km SW of Fano (60888 inhabitants)
49 Km S of Pesaro (94582 inhabitants)
51 Km NE of Perugia (166134 inhabitants)
58 Km N of Foligno (57155 inhabitants)
63 Km W of Ancona (100861 inhabitants)
67 Km S of Rimini (147750 inhabitants)
71 Km E of Arezzo (99543 inhabitants)
84 Km SE of Cesena (96758 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 0.5 2021-01-04
12:49:48		 43.48 12.7657 15 2021-07-12
16:54:56		 Bollettino Sismico Italiano INGV 86354731
Reviewed
Rev100 		ML 0.5 2021-01-04
12:49:48		 43.4825 12.7693 15 2021-01-04
12:58:05		 Sala Sismica INGV-Roma 86013391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-04 12:49:48 ± 0.13
Latitude 43.4800 ± 0.0036
Longitude 12.7657 ± 0.0062
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86354731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 363
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 327
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.30847
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86013391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-04 12:58:05

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86354731
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-18 15:57:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATLO.EHE. 2021-01-04T12:49:59.88 0.3 undecidable manual S 238 34.2435 101 0.01 73
IV.MURB.HHE. 2021-01-04T12:49:59.29 0.3 undecidable manual S 219 30.9468 103 0.27 70
IV.ATPI.EHZ. 2021-01-04T12:49:58.83 0.3 undecidable manual S 264 29.4483 104 0.2 71
IV.ATPC.HNZ. 2021-01-04T12:49:57.83 0.3 undecidable manual S 270 24.8529 108 0.38 69
IV.FOSV.EHZ. 2021-01-04T12:49:56.39 0.6 undecidable manual S 181 20.5683 114 0.01 50
IV.NARO.HHZ. 2021-01-04T12:49:56.33 0.3 undecidable manual S 314 20.7681 114 -0.11 74
IV.PIEI.HHZ. 2021-01-04T12:49:55.80 0.3 undecidable manual S 288 19.5693 116 -0.34 70
IV.ARVD.HHZ. 2021-01-04T12:49:55.23 0.3 undecidable manual S 82 14.2746 127 0.29 71
IV.MPAG.EHZ. 2021-01-04T12:49:55.55 0.6 undecidable manual S 358 16.5723 122 0.11 49
IV.ATPI.EHZ. 2021-01-04T12:49:54.31 0.3 undecidable manual P 264 29.4483 104 0.1 72
IV.ATLO.EHE. 2021-01-04T12:49:54.51 0.3 undecidable manual P 238 34.2435 101 -0.41 67
IV.MURB.HHE. 2021-01-04T12:49:54.77 0.1 undecidable manual P 219 30.9468 103 0.34 92
IV.FRON.EHZ. 2021-01-04T12:49:53.27 0.6 undecidable manual S 322 5.2947 157 -0.17 50
IV.ATSC.EHZ. 2021-01-04T12:49:53.87 0.3 undecidable manual S 226 8.88 143 -0.05 75
IV.SSFR.HHZ. 2021-01-04T12:49:53.40 0.6 undecidable manual S 165 4.995 158 -0.02 51
IV.ATPC.HNZ. 2021-01-04T12:49:53.56 0.1 undecidable manual P 270 24.8529 108 0.03 98
IV.MPAG.EHZ. 2021-01-04T12:49:52.59 0.3 undecidable manual P 358 16.5723 122 0.22 71
IV.PIEI.HHZ. 2021-01-04T12:49:52.73 0.1 undecidable manual P 288 19.5693 116 -0.04 100
IV.FOSV.EHZ. 2021-01-04T12:49:52.52 0.1 undecidable manual P 181 20.5683 114 -0.39 93
IV.NARO.HHZ. 2021-01-04T12:49:52.58 0.3 undecidable manual P 314 20.7681 114 -0.37 70
IV.SSFR.HHZ. 2021-01-04T12:49:51.03 0.3 undecidable manual P 165 4.995 158 -0.17 75
IV.FRON.EHZ. 2021-01-04T12:49:51.33 0.3 undecidable manual P 322 5.2947 157 0.12 75
IV.ATSC.EHZ. 2021-01-04T12:49:51.55 0.3 undecidable manual P 226 8.88 143 0.06 76
IV.ARVD.HHZ. 2021-01-04T12:49:51.92 0.3 undecidable manual P 82 14.2746 127 -0.16 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRON.EHE. ML:0.8 0.0000606 0.16 AML other m 2021-01-04T12:49:53.33
IV.FRON.EHN. ML:0.8 0.00007539999999999999 0.7 AML other m 2021-01-04T12:49:53.45
IV.ARVD.HHE. ML:0.3 0.0000139234205 0.0576 AML other m 2021-01-04T12:49:55.58
IV.MPAG.EHE. ML:0.6 0.000029558130000000003 0.1216 AML other m 2021-01-04T12:49:55.71
IV.MPAG.EHN. ML:0.3 0.000013480279 0.0576 AML other m 2021-01-04T12:49:55.92
IV.PIEI.HHN. ML:0.5 0.00002155 1.72 AML other m 2021-01-04T12:49:55.05
IV.ARVD.HHN. ML:0.3 0.0000157656355 0.0576 AML other m 2021-01-04T12:49:55.96
IV.PIEI.HHE. ML:0.7 0.0000288 0.68 AML other m 2021-01-04T12:49:56.18
IV.NARO.HHN. ML:0.2 0.0000108456375 0.064 AML other m 2021-01-04T12:49:57.14
IV.NARO.HHE. ML:0.4 0.00001647627 0.064 AML other m 2021-01-04T12:49:58.13
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