Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 25-11-2020 and time 09:55:10 (UTC) in region 1 km SW Serra San Quirico (AN)

A magnitude ML 0.9 earthquake occured in region: 1 km SW Serra San Quirico (AN), on

  • 25-11-2020 09:55:10 (UTC)
  • 25-11-2020 10:55:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.44, 13 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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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 San Quirico AN 1 2850 2850
Mergo AN 5 1037 3887
Genga AN 5 1797 5684
Rosora AN 7 1985 7669
Arcevia AN 8 4612 12281
Castelplanio AN 9 3540 15821
Cupramontana AN 9 4756 20577
Poggio San Vicino MC 10 246 20823
Poggio San Marcello AN 10 693 21516
Maiolati Spontini AN 11 6248 27764
Montecarotto AN 11 1987 29751
Sassoferrato AN 11 7285 37036
Serra de' Conti AN 12 3746 40782
Apiro MC 12 2280 43062
Monte Roberto AN 12 3061 46123
Castelbellino AN 13 4947 51070
Cerreto d'Esi AN 13 3817 54887
Fabriano AN 14 31480 86367
San Paolo di Jesi AN 14 933 87300
Staffolo AN 15 2253 89553
Barbara AN 16 1368 90921
San Lorenzo in Campo PU 19 3414 94335
Castelleone di Suasa AN 19 1676 96011
Ostra Vetere AN 19 3311 99322
Pergola PU 19 6333 105655
Cingoli MC 19 10352 116007
Serra Sant'Abbondio PU 19 1027 117034

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km S of Fano (60888 inhabitants)
46 Km W of Ancona (100861 inhabitants)
53 Km S of Pesaro (94582 inhabitants)
59 Km NE of Foligno (57155 inhabitants)
62 Km NE of Perugia (166134 inhabitants)
77 Km SE of Rimini (147750 inhabitants)
90 Km E of Arezzo (99543 inhabitants)
98 Km SE of Cesena (96758 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 0.9 2020-11-25
09:55:10		 43.44 13 6 2020-11-25
10:01:04		 Sala Sismica INGV-Roma 85003351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-25 09:55:10 ± 0.16
Latitude 43.44 ± 0.01
Longitude 13.00 ± 0.01
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 85003351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1024
Semi-minor axis of confidence ellipse (meter) 624
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 35
Circular confidence region, given by single value of horizontal uncertainty (meter) 1020
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 152
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.0027
Epicentral distance of station farthest from the epicenter (degree) 0.44247
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85003351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-25 10:01:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2020-11-25T09:55:27.63 0.6 undecidable manual S 189 0.4425 50 0.04 47
IV.FDMO.HHZ. 2020-11-25T09:55:26.99 0.6 undecidable manual S 171 0.4101 50 0.35 44
IV.MML1.HNN. 2020-11-25T09:55:24.54 0.6 undecidable manual S 184 0.3292 100 0.75 39
IV.MPAG.EHZ. 2020-11-25T09:55:21.36 0.6 undecidable manual S 317 0.2563 102 0.32 46
IV.CESI.HHZ. 2020-11-25T09:55:20.27 0.6 negative manual P 189 0.4425 50 -0.28 44
IV.FRON.EHZ. 2020-11-25T09:55:20.02 0.6 undecidable manual S 291 0.2131 105 0.58 43
IV.FDMO.HHZ. 2020-11-25T09:55:19.19 0.6 undecidable manual P 171 0.4101 50 -0.81 38
IV.NARO.HHZ. 2020-11-25T09:55:19.06 0.6 undecidable manual P 299 0.348 99 0.28 45
IV.MPAG.EHZ. 2020-11-25T09:55:17.16 1.0 undecidable manual P 317 0.2563 102 0.39 22
IV.CING.HNE. 2020-11-25T09:55:17.82 0.6 undecidable manual S 115 0.1565 110 0.5 45
IV.EL6.EHZ. 2020-11-25T09:55:17.40 0.6 undecidable manual S 147 0.134 113 0.86 39
IV.SSFR.HHZ. 2020-11-25T09:55:17.51 0.6 undecidable manual S 268 0.1583 109 0.1 49
IV.MML1.HNN. 2020-11-25T09:55:17.90 0.1 undecidable manual P 184 0.3292 100 -0.46 87
IV.SNTG.HHZ. 2020-11-25T09:55:15.24 0.3 undecidable manual P 193 0.1916 106 -0.14 72
IV.FRON.EHZ. 2020-11-25T09:55:15.84 0.6 positive manual P 291 0.2131 105 0 49
IV.ARVD.HHZ. 2020-11-25T09:55:14.49 0.6 undecidable manual S 323 0.071 128 0.08 50
IV.CING.HNE. 2020-11-25T09:55:14.75 0.1 undecidable manual P 115 0.1565 110 0.12 97
IV.SSFR.HHZ. 2020-11-25T09:55:14.54 0.3 undecidable manual P 268 0.1583 109 -0.14 72
IV.EL6.EHZ. 2020-11-25T09:55:13.61 1.0 undecidable manual P 147 0.134 113 -0.56 22
IV.ARVD.HHZ. 2020-11-25T09:55:12.89 0.1 positive manual P 323 0.071 128 -0.05 100
IV.MMUR.HNZ. 2020-11-25T09:55:11.44 0.1 negative manual P 270 0.0027 177 -0.74 84
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSFR.HHE. ML:1.1 0.000121 0.28 AML other m 2020-11-25T09:55:18.22
IV.SNTG.HHE. ML:0.7 4.08E-5 1.16 AML other m 2020-11-25T09:55:20.02
IV.SSFR.HHN. ML:1.2 0.00015 0.18 AML other m 2020-11-25T09:55:20.32
IV.SNTG.HHN. ML:0.8 5.04E-5 1.14 AML other m 2020-11-25T09:55:21.58
IV.FRON.EHN. ML:0.9 5.045E-5 0.6 AML other m 2020-11-25T09:55:21.99
IV.FRON.EHE. ML:0.8 4.1E-5 1.14 AML other m 2020-11-25T09:55:26.84
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