Earthquake with magnitude of ML 0.8 on date 23-02-2021 and time 03:54:16 (Italy) in region 4 km SW Serra Sant'Abbondio (PU)

A magnitude ML 0.8 earthquake occured in region: 4 km SW Serra Sant'Abbondio (PU), on

  • 23-02-2021 02:54:16 (UTC)
  • 23-02-2021 03:54:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.46, 12.75 at 15 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.

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 4 1027 1027
Frontone PU 7 1300 2327
Scheggia e Pascelupo PG 9 1393 3720
Sassoferrato AN 9 7285 11005
Cantiano PU 10 2245 13250
Costacciaro PG 11 1216 14466
Cagli PU 13 8731 23197
Sigillo PG 14 2404 25601
Pergola PU 14 6333 31934
Genga AN 16 1797 33731
Arcevia AN 16 4612 38343
Gubbio PG 18 32216 70559
Fossato di Vico PG 18 2840 73399
Fabriano AN 18 31480 104879
Acqualagna PU 19 4393 109272

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km SW of Fano (60888 inhabitants)
49 Km NE of Perugia (166134 inhabitants)
52 Km S of Pesaro (94582 inhabitants)
56 Km N of Foligno (57155 inhabitants)
65 Km W of Ancona (100861 inhabitants)
69 Km S of Rimini (147750 inhabitants)
70 Km E of Arezzo (99543 inhabitants)
86 Km SE of Cesena (96758 inhabitants)
100 Km N of Terni (111501 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.8 2021-02-23
02:54:16
43.46 12.75 15 2021-02-23
02:58:39
Sala Sismica INGV-Roma 87396741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-23 02:54:16 ± 0.07
Latitude 43.46 ± 0.00
Longitude 12.75 ± 0.00
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87396741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 324
Semi-minor axis of confidence ellipse (meter) 141
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30037
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 87396741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-23 02:58:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MURB.HHZ. 2021-02-23T02:54:27.16 0.3 undecidable manual S 220 0.2527 103 0.22 69
IV.CSP1.EHZ. 2021-02-23T02:54:26.91 3.0 positive manual P -0.09 0
IV.NARO.HHZ. 2021-02-23T02:54:25.36 0.3 undecidable manual S 322 0.1961 110 0.04 73
IV.FOSV.EHZ. 2021-02-23T02:54:24.24 0.1 undecidable manual S 177 0.1619 116 -0.16 96
IV.ATFO.HHZ. 2021-02-23T02:54:24.35 0.1 undecidable manual S 235 0.1565 117 0.1 97
IV.PIEI.HHZ. 2021-02-23T02:54:24.54 0.3 undecidable manual S 297 0.1736 114 -0.16 70
IV.ATBU.EHZ. 2021-02-23T02:54:24.34 0.3 undecidable manual S 278 0.1457 120 0.36 69
IV.ARVD.HHZ. 2021-02-23T02:54:24.09 0.3 undecidable manual S 74 0.1466 120 0.11 72
IV.MPAG.EHZ. 2021-02-23T02:54:24.80 0.3 undecidable manual S 3 0.1727 114 0.12 72
IV.PE3.EHZ. 2021-02-23T02:54:23.75 0.6 undecidable manual P 323 0.3004 100 0.26 45
IV.ATCC.EHZ. 2021-02-23T02:54:23.16 3.0 negative manual P 0.03 0
IV.ATSC.EHE. 2021-02-23T02:54:22.02 0.3 undecidable manual S 234 0.0558 152 -0.06 74
IV.FRON.EHZ. 2021-02-23T02:54:22.10 0.3 undecidable manual S 345 0.063 149 -0.1 73
IV.MURB.HHZ. 2021-02-23T02:54:22.77 0.6 positive manual P 220 0.2527 103 0.08 47
IV.ATBU.EHZ. 2021-02-23T02:54:21.09 0.1 undecidable manual P 278 0.1457 120 0.11 97
IV.MPAG.EHZ. 2021-02-23T02:54:21.40 0.6 positive manual P 3 0.1727 114 0.02 49
IV.SSFR.HHZ. 2021-02-23T02:54:21.83 0.3 undecidable manual S 129 0.0324 163 0.01 75
IV.FOSV.EHZ. 2021-02-23T02:54:21.05 0.1 positive manual P 177 0.1619 116 -0.17 96
IV.NARO.HHZ. 2021-02-23T02:54:21.62 0.1 positive manual P 322 0.1961 110 -0.14 95
IV.ATFO.HHZ. 2021-02-23T02:54:21.09 0.1 negative manual P 235 0.1565 117 -0.05 98
IV.PIEI.HHZ. 2021-02-23T02:54:21.22 0.6 positive manual P 297 0.1736 114 -0.18 47
IV.ARVD.HHZ. 2021-02-23T02:54:20.98 0.1 negative manual P 74 0.1466 120 0 98
IV.SSFR.HHZ. 2021-02-23T02:54:19.71 0.6 undecidable manual P 129 0.0324 163 -0.03 50
IV.ATSC.EHE. 2021-02-23T02:54:19.80 0.1 undecidable manual P 234 0.0558 152 -0.09 99
IV.FRON.EHZ. 2021-02-23T02:54:19.97 0.1 positive manual P 345 0.063 149 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSFR.HHE. ML:1.5 0.000382 0.16 AML other m 2021-02-23T02:54:21.86
IV.SSFR.HNE. ML:1.6 0.0005145 0.16 AML other m 2021-02-23T02:54:21.87
IV.SSFR.HHN. ML:1.4 0.0002635 1.62 AML other m 2021-02-23T02:54:21.94
IV.SSFR.HNN. ML:1.5 0.0003845 0.04 AML other m 2021-02-23T02:54:22.06
IV.FRON.EHE. ML:1 0.000122 0.18 AML other m 2021-02-23T02:54:22.18
IV.FRON.EHN. ML:0.9 9.255E-5 1.84 AML other m 2021-02-23T02:54:22.98
IV.FOSV.EHN. ML:0.9 5.265E-5 0.14 AML other m 2021-02-23T02:54:24.37
IV.FOSV.EHE. ML:0.6 2.935E-5 0.36 AML other m 2021-02-23T02:54:24.33
IV.PIEI.HHN. ML:0.7 3.425E-5 0.64 AML other m 2021-02-23T02:54:24.96
IV.PIEI.HHE. ML:0.9 5.3E-5 0.14 AML other m 2021-02-23T02:54:24.90
IV.MPAG.EHE. ML:0.6 3.105E-5 0.42 AML other m 2021-02-23T02:54:24.87
IV.MPAG.EHN. ML:0.5 1.8515E-5 0.18 AML other m 2021-02-23T02:54:24.84
IV.NARO.HHE. ML:0.7 3.245E-5 0.08 AML other m 2021-02-23T02:54:25.60
IV.NARO.HHN. ML:0.7 2.77E-5 0.66 AML other m 2021-02-23T02:54:26.12
IV.MURB.HHN. ML:1.4 0.0001105 0.24 AML other m 2021-02-23T02:54:27.77
IV.MURB.HHE. ML:1.4 0.000125 1.58 AML other m 2021-02-23T02:54:28.92
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download