Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 23-10-2020 and time 01:17:38 (UTC) in region 4 km N San Severino Marche (MC)

A magnitude ML 0.7 earthquake occured in region: 4 km N San Severino Marche (MC), on

  • 23-10-2020 01:17:38 (UTC)
  • 23-10-2020 03:17:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2650, 13.1850 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.

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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
San Severino Marche MC 4 12726 12726
Serrapetrona MC 10 966 13692
Gagliole MC 10 620 14312
Tolentino MC 10 20069 34381
Treia MC 12 9403 43784
Belforte del Chienti MC 12 1886 45670
Castelraimondo MC 12 4587 50257
Cingoli MC 13 10352 60609
Pollenza MC 13 6618 67227
Matelica MC 14 9981 77208
Caldarola MC 14 1823 79031
Apiro MC 15 2280 81311
Poggio San Vicino MC 15 246 81557
Camporotondo di Fiastrone MC 16 563 82120
Camerino MC 17 6974 89094
Appignano MC 17 4213 93307
Cerreto d'Esi AN 17 3817 97124
Urbisaglia MC 17 2628 99752
Colmurano MC 18 1263 101015
Cessapalombo MC 18 512 101527
Pioraco MC 19 1134 102661
Staffolo AN 19 2253 104914
Esanatoglia MC 19 2034 106948

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km SW of Ancona (100861 inhabitants)
52 Km NE of Foligno (57155 inhabitants)
66 Km S of Fano (60888 inhabitants)
67 Km E of Perugia (166134 inhabitants)
75 Km SE of Pesaro (94582 inhabitants)
80 Km NW of Teramo (54892 inhabitants)
90 Km NE of Terni (111501 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 0.7 2020-10-23
01:17:38		 43.2647 13.1852 15 2020-10-23
01:27:38		 Sala Sismica INGV-Roma 84041901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-23 01:17:38 ± 0.1
Latitude 43.2647 ± 0.0036
Longitude 13.1852 ± 0.0074
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 84041901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 281
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 82
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.41639
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 84041901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-23 01:27:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2020-10-23T01:17:52.33 0.3 undecidable manual S 164 42.1245 97 0.29 69
IV.FOSV.EHZ. 2020-10-23T01:17:50.24 0.6 undecidable manual S 276 34.4433 100 0.24 47
IV.ARVD.HHZ. 2020-10-23T01:17:49.75 0.6 undecidable manual S 323 32.5452 101 0.25 47
IV.FDMO.HHZ. 2020-10-23T01:17:48.08 0.6 undecidable manual S 197 26.5512 105 0.13 49
IV.MML1.HNZ. 2020-10-23T01:17:47.41 0.6 undecidable manual S 226 24.0537 107 0.09 49
IV.CSP1.EHZ. 2020-10-23T01:17:46.18 0.6 undecidable manual S 175 19.2696 114 0.07 50
IV.AOI.HHE. 2020-10-23T01:17:46.70 0.1 undecidable manual P 47 46.2204 96 -0.14 95
IV.SNTG.HHZ. 2020-10-23T01:17:46.27 0.6 undecidable manual S 267 19.7691 113 0.03 51
IV.MMO1.EHZ. 2020-10-23T01:17:46.18 0.1 undecidable manual P 164 42.1245 97 -0.05 97
IV.PP3.HNN. 2020-10-23T01:17:45.96 0.1 undecidable manual P 70 36.4413 99 0.6 84
IV.MNTT.EHZ. 2020-10-23T01:17:45.49 0.1 undecidable manual P 124 40.1265 98 -0.43 90
IV.EL6.EHZ. 2020-10-23T01:17:44.20 0.6 undecidable manual S 317 9.879 139 0.12 51
IV.FOSV.EHZ. 2020-10-23T01:17:44.78 0.6 positive manual P 276 34.4433 100 -0.27 47
IV.ARVD.HHZ. 2020-10-23T01:17:44.90 1.0 undecidable manual P 323 32.5452 101 0.14 24
IV.PF6.EHZ. 2020-10-23T01:17:44.83 0.1 undecidable manual S 177 14.0748 126 -0.09 100
IV.CING.HNZ. 2020-10-23T01:17:44.45 0.6 undecidable manual S 4 12.2766 131 -0.1 50
IV.FDMO.HHZ. 2020-10-23T01:17:43.66 0.6 positive manual P 197 26.5512 105 -0.2 48
IV.MDAR.HNZ. 2020-10-23T01:17:43.90 0.3 undecidable manual S 203 8.6802 143 0.02 77
IV.MML1.HNZ. 2020-10-23T01:17:43.21 0.1 undecidable manual P 226 24.0537 107 -0.29 95
IV.CSP1.EHZ. 2020-10-23T01:17:42.69 1.0 undecidable manual P 175 19.2696 114 -0.11 25
IV.SNTG.HHZ. 2020-10-23T01:17:42.87 1.0 undecidable manual P 267 19.7691 113 -0.01 25
IV.PF6.EHZ. 2020-10-23T01:17:41.90 0.1 undecidable manual P 177 14.0748 126 -0.21 98
IV.CING.HNZ. 2020-10-23T01:17:41.65 0.1 undecidable manual P 4 12.2766 131 -0.25 98
IV.EL6.EHZ. 2020-10-23T01:17:41.58 0.6 negative manual P 317 9.879 139 -0.05 51
IV.MDAR.HNZ. 2020-10-23T01:17:41.94 0.1 undecidable manual P 203 8.6802 143 0.43 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSP1.EHE. ML:1.0 0.00005834037 0.2 AML other m 2020-10-23T01:17:46.75
IV.CSP1.EHN. ML:0.8 0.0000443815 0.4 AML other m 2020-10-23T01:17:46.36
IV.SNTG.HHE. ML:0.7 0.00002800347 0.16 AML other m 2020-10-23T01:17:46.40
IV.SNTG.HHN. ML:0.5 0.000021804035 0.18 AML other m 2020-10-23T01:17:46.44
IV.SNTG.HNE. ML:1.2 0.00009432541999999999 0.7496 AML other m 2020-10-23T01:17:46.48
IV.FDMO.HHE. ML:0.9 0.000040872395 0.18 AML other m 2020-10-23T01:17:48.28
IV.FDMO.HHN. ML:0.6 0.000021405125 0.16 AML other m 2020-10-23T01:17:48.53
IV.FOSV.EHE. ML:0.4 0.000009372211 0.36 AML other m 2020-10-23T01:17:51.77
IV.FOSV.EHN. ML:0.6 0.0000131371455 0.26 AML other m 2020-10-23T01:17:50.89
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