Earthquake with magnitude of ML 0.8 on date 27-09-2021 and time 19:34:00 (UTC) in region 5 km NE San Severino Marche (MC)

A magnitude ML 0.8 earthquake occured in region: 5 km NE San Severino Marche (MC), on

  • 27-09-2021 19:34:00 (UTC)
  • 27-09-2021 21:34:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.268, 13.216 at 10 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
San Severino Marche MC 5 12726 12726
Tolentino MC 9 20069 32795
Treia MC 9 9403 42198
Serrapetrona MC 10 966 43164
Pollenza MC 11 6618 49782
Belforte del Chienti MC 12 1886 51668
Cingoli MC 12 10352 62020
Gagliole MC 12 620 62640
Castelraimondo MC 14 4587 67227
Caldarola MC 14 1823 69050
Appignano MC 15 4213 73263
Urbisaglia MC 15 2628 75891
Apiro MC 16 2280 78171
Camporotondo di Fiastrone MC 16 563 78734
Poggio San Vicino MC 16 246 78980
Colmurano MC 16 1263 80243
Matelica MC 17 9981 90224
Cessapalombo MC 18 512 90736
Staffolo AN 19 2253 92989
Ripe San Ginesio MC 19 852 93841
Camerino MC 19 6974 100815
Cerreto d'Esi AN 20 3817 104632
Macerata MC 20 42473 147105
San Ginesio MC 20 3498 150603
Loro Piceno MC 20 2401 153004

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km SW of Ancona (100861 inhabitants)
54 Km NE of Foligno (57155 inhabitants)
66 Km S of Fano (60888 inhabitants)
69 Km E of Perugia (166134 inhabitants)
76 Km SE of Pesaro (94582 inhabitants)
79 Km NW of Teramo (54892 inhabitants)
91 Km NE of Terni (111501 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 2021-09-27
19:34:00
43.2685 13.2157 10 2021-09-27
19:42:35
Sala Sismica INGV-Roma 95959731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 19:34:00 ± 0.19
Latitude 43.2685 ± 0.0090
Longitude 13.2157 ± 0.0173
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95959731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1380
Semi-minor axis of confidence ellipse (meter) 884
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 262
Circular confidence region, given by single value of horizontal uncertainty (meter) 1380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.37772
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 95959731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 19:42:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAPR.HNZ. 2021-09-27T19:35:47.50 3.0 undecidable manual Sg 16.83 0
AC.KBN.HHZ. 2021-09-27T19:35:36.12 3.0 negative manual Pg 14.08 0
IV.HCRL.HHZ. 2021-09-27T19:35:34.28 3.0 negative manual Pg 18.5 0
IV.MAGA.HHZ. 2021-09-27T19:35:30.78 3.0 undecidable manual Sn 4.35 0
OT.OT15.EHZ. 2021-09-27T19:35:25.68 3.0 undecidable manual Sg 5.21 0
IV.ZEN8.EHZ. 2021-09-27T19:35:19.52 3.0 undecidable manual Sn -3.14 0
IV.HVZN.HHZ. 2021-09-27T19:35:14.60 3.0 undecidable manual Pn -1.79 0
IV.ESCV.HHZ. 2021-09-27T19:35:12.06 3.0 negative manual Pn 3.03 0
IV.SELL.HHZ. 2021-09-27T19:35:12.03 3.0 undecidable manual Pg 10.68 0
MN.TRI.HHZ. 2021-09-27T19:35:10.34 3.0 undecidable manual Sn -3.22 0
IV.JOPP.HHZ. 2021-09-27T19:35:02.25 3.0 undecidable manual Pn 0.4 0
IV.COLB.HHZ. 2021-09-27T19:34:57.79 3.0 undecidable manual Sg 5.55 0
IV.VCRE.HHZ. 2021-09-27T19:34:46.80 3.0 undecidable manual Sn -7.52 0
IV.VCRE.HHZ. 2021-09-27T19:34:29.38 3.0 undecidable manual Pg 1.48 0
IV.POFI.HHZ. 2021-09-27T19:34:24.46 3.0 undecidable manual Sn -4.71 0
IV.TREM.HHZ. 2021-09-27T19:34:19.86 3.0 positive manual Pn -3.9 0
IV.NRCA.HHZ. 2021-09-27T19:34:15.64 3.0 undecidable manual S 0
IV.MMO1.HNZ. 2021-09-27T19:34:13.63 0.6 undecidable manual S 168 0.3777 50 -0.53 45
IV.MC2.EHZ. 2021-09-27T19:34:13.54 0.6 undecidable manual S 183 0.357 50 -0.02 50
IV.RMP.HHZ. 2021-09-27T19:34:12.17 3.0 positive manual P 0.11 0
IV.NRCA.HHZ. 2021-09-27T19:34:11.24 3.0 undecidable manual P 0
IV.MML1.EHZ. 2021-09-27T19:34:10.43 0.6 undecidable manual S 229 0.2356 50 0.47 47
IV.FDMO.HHZ. 2021-09-27T19:34:10.22 0.6 undecidable manual S 202 0.25 50 -0.16 50
IV.SNTG.HHE. 2021-09-27T19:34:08.97 0.6 undecidable manual S 266 0.2005 115 0.12 51
IV.CSP1.EHZ. 2021-09-27T19:34:08.42 0.6 undecidable manual S 183 0.1772 118 0.4 48
IV.MC2.EHZ. 2021-09-27T19:34:08.87 0.1 undecidable manual P 183 0.357 50 0.89 78
IV.MF5.EHZ. 2021-09-27T19:34:08.14 0.1 undecidable manual P 148 0.3318 50 0.6 88
IV.MMO1.HNZ. 2021-09-27T19:34:07.73 0.1 undecidable manual P 168 0.3777 50 -0.59 88
IV.PF6.EHZ. 2021-09-27T19:34:06.91 0.6 undecidable manual S 187 0.1313 125 0.38 49
IV.CING.HNE. 2021-09-27T19:34:06.48 0.6 undecidable manual S 352 0.1079 131 0.66 45
IV.FDMO.HHZ. 2021-09-27T19:34:05.38 1.0 negative manual P 202 0.25 50 -0.75 21
IV.MML1.EHZ. 2021-09-27T19:34:05.40 1.0 undecidable manual P 229 0.2356 50 -0.49 23
IV.SNTG.HHE. 2021-09-27T19:34:05.04 0.1 undecidable manual P 266 0.2005 115 -0.21 100
IV.CSP1.EHZ. 2021-09-27T19:34:04.29 0.6 positive manual P 183 0.1772 118 -0.48 47
IV.CING.HNE. 2021-09-27T19:34:03.15 0.1 undecidable manual P 352 0.1079 131 -0.35 99
IV.EL6.EHZ. 2021-09-27T19:34:03.67 1.0 undecidable manual P 306 0.1025 132 0.26 25
IV.PF6.EHZ. 2021-09-27T19:34:03.58 0.1 undecidable manual P 187 0.1313 125 -0.33 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1 3.035E-5 0.52 AML other m 2021-09-27T19:34:03.59
IV.NRCA.HHN. ML:1 2.295E-5 0.5 AML other m 2021-09-27T19:34:03.65
IV.FDMO.HHN. ML:0.7 2.585E-5 0.18 AML other m 2021-09-27T19:34:10.50
IV.FDMO.HHE. ML:0.8 3.2E-5 0.14 AML other m 2021-09-27T19:34:10.50
IV.MML1.EHN. ML:0.6 2.02E-5 1.08 AML other m 2021-09-27T19:34:10.61
IV.MML1.EHE. ML:0.6 2.515E-5 0.24 AML other m 2021-09-27T19:34:10.53
IV.ZEN8.EHN. ML:2.7 4.81E-5 0.44 AML other m 2021-09-27T19:35:25.03
IV.ZEN8.EHE. ML:2.7 4.55E-5 0.74 AML other m 2021-09-27T19:35:25.65
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