Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 6.5 on date 31-10-2019 and time 02:11:19 (Italy) in region Philippines [Land]

A magnitude Mwp 6.5 earthquake occured in region: Philippines [Land], on

  • 31-10-2019 01:11:19 (UTC)
  • 31-10-2019 02:11:19 (UTC +01:00) Italian time
  • 31-10-2019 09:11:19 (UTC +08:00) local time in the region of the earthquake (Asia/Manila)

and geographic coordinates (lat, lon) 6.94, 125.31 at 20 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 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 		mb 5.6
Mwp 6.5
Mwpd 6.6 		2019-10-31
01:11:19		 6.94 125.31 20 2019-10-31
01:26:06		 Sala Sismica INGV-Roma 73544151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-31 01:11:19
Latitude 6.94
Longitude 125.31
Depth (km) 20 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 73544151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 5506
Semi-minor axis of confidence ellipse (meter) 2737
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 279
Circular confidence region, given by single value of horizontal uncertainty (meter) 4976.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48.3632
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 57
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.20735
Epicentral distance of station closest to the epicenter (degree) 0.29458
Epicentral distance of station farthest from the epicenter (degree) 44.33625
Number of stations at which the event was observed 51
Number of stations from which data was used for origin computation 51
Magnitudes information

Mwp:6.5

Field Value
Value 6.5
Uncertainty 0.1
Num. used stations 40
Type of magnitude Mwp
Reference to an origin 73544151
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2019-10-31 01:26:06

Mwpd:6.6

Field Value
Value 6.6
Uncertainty 0.2
Num. used stations 27
Type of magnitude Mwpd
Reference to an origin 73544151
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2019-10-31 01:26:06

mb:5.6

Field Value
Value 5.6
Uncertainty 0.1
Num. used stations 41
Type of magnitude mb
Reference to an origin 73544151
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2019-10-31 01:26:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.HALK.BHZ. 2019-10-31T01:19:30.25 10.0 positive automatic pP 272 44.3362 -3.20578 0
GE.HALK.BHZ. 2019-10-31T01:19:28.75 10.0 positive automatic P 272 44.3362 1.5233 0.621525
IU.ULN.BHZ.00 2019-10-31T01:19:22.72 10.0 positive automatic P 342 43.7795 -0.29745 0.676094
AU.HTT.BHZ. 2019-10-31T01:19:11.60 10.0 positive automatic P 163 42.3808 0.0524861 0.710449
IO.EVN.BHZ. 2019-10-31T01:19:10.85 10.0 negative automatic P 305 42.0276 1.44412 0.236203
AU.EIDS.BHZ. 2019-10-31T01:18:58.42 10.0 negative automatic P 143 40.8832 -0.773302 0.72167
IU.NWAO.BHZ.00 2019-10-31T01:18:56.55 10.0 negative automatic P 190 40.5952 -0.296705 0.753708
AU.QLP.BHZ. 2019-10-31T01:18:36.62 10.0 positive automatic P 152 38.2103 -0.29749 0.772902
IN.SHL.HHZ. 2019-10-31T01:18:27.34 10.0 positive automatic P 304 36.9442 1.17976 0.750128
AU.MORW.BHZ. 2019-10-31T01:18:26.77 10.0 negative automatic P 194 37.0938 -0.713054 0.804285
JP.JTM.BHZ. 2019-10-31T01:18:23.35 10.0 positive automatic P 20 36.653 -0.356328 0.37529
JP.JMM.BHZ. 2019-10-31T01:17:59.90 10.0 positive automatic P 22 33.9653 -0.678217 0.847902
JP.JSD.BHZ. 2019-10-31T01:17:51.90 10.0 positive automatic P 19 33.2396 -2.36306 0.407648
IN.PBA.HHZ. 2019-10-31T01:17:47.66 10.0 negative automatic P 281 32.4647 0.184387 0.310193
IU.MAJO.BHZ.00 2019-10-31T01:17:39.87 10.0 positive automatic P 20 31.861 -2.35953 0.421097
JP.JGF.BHZ. 2019-10-31T01:17:31.25 10.0 negative automatic P 19 30.7198 -0.959432 0.915066
G.INU.BHZ.00 2019-10-31T01:17:28.41 10.0 positive automatic P 19 30.3809 -0.725346 0.922229
IU.MBWA.BHZ.00 2019-10-31T01:17:12.70 10.0 positive automatic P 191 28.6238 -0.881822 0.952381
IU.CHTO.BHZ.00 2019-10-31T01:17:11.52 10.0 negative automatic P 297 28.2582 1.15784 0.941176
GE.GSI.BHZ. 2019-10-31T01:17:09.32 10.0 negative automatic P 260 28.221 -0.657098 0.909091
JP.JMN.BHZ. 2019-10-31T01:17:07.25 10.0 positive automatic P 15 27.9407 -0.29811 0.43956
JP.JTU.BHZ. 2019-10-31T01:17:06.10 10.0 positive automatic P 7 27.8455 -0.518355 0.816327
AU.COEN.BHZ. 2019-10-31T01:17:02.50 10.0 positive automatic P 140 27.3988 -0.165191 0.987654
IU.PMG.BHZ.00 2019-10-31T01:17:01.82 10.0 positive automatic P 127 27.2159 0.839748 0.754717
JP.JNU.BHZ. 2019-10-31T01:16:54.80 10.0 positive automatic P 10 26.6912 -1.53503 0.615385
AU.XMI.BHZ. 2019-10-31T01:16:50.12 10.0 negative automatic P 229 26.1547 -1.32352 0.610687
JP.JCJ.BHZ. 2019-10-31T01:16:46.50 10.0 positive automatic P 36 25.7478 -1.2413 0.43956
GE.MNAI.BHZ. 2019-10-31T01:16:41.52 10.0 positive automatic P 244 25.0119 0.464012 0.851064
MY.KUM.BHZ. 2019-10-31T01:16:37.22 10.0 negative automatic P 268 24.576 0.144296 0.888889
MY.IPM.BHZ. 2019-10-31T01:16:33.97 10.0 negative automatic P 266 24.2883 -0.513438 0.869565
AU.MANU.BHZ.00 2019-10-31T01:16:31.25 10.0 positive automatic P 111 23.769 1.52804 0.43956
MY.KOM.BHZ. 2019-10-31T01:16:11.37 10.0 negative automatic P 257 22.0061 -0.085258 0.869565
GE.SMRI.BHZ. 2019-10-31T01:15:55.37 10.0 negative automatic P 227 20.3884 1.31928 0.740741
JP.JOW.BHZ. 2019-10-31T01:15:51.50 10.0 positive automatic P 8 20.0965 0.618996 0.43956
JP.JMZ.BHZ. 2019-10-31T01:15:48.10 10.0 negative automatic P 16 19.7059 1.50547 0.816327
GE.JAGI.BHZ. 2019-10-31T01:15:38.27 10.0 negative automatic P 216 19.0041 -0.664609 0.714286
IU.TATO.BHZ.00 2019-10-31T01:15:31.17 10.0 positive automatic P 349 18.4022 -1.15251 0
GE.GENI.BHZ. 2019-10-31T01:15:23.22 10.0 positive automatic P 122 17.6229 0.396039 0.930233
JP.YOJ.BHZ. 2019-10-31T01:15:22.15 10.0 positive automatic P 353 17.6684 -1.23482 0.43956
GE.SOEI.BHZ. 2019-10-31T01:15:12.57 10.0 positive automatic P 184 16.7235 0.812572 0.930233
MY.KSM.BHZ. 2019-10-31T01:15:02.17 10.0 positive automatic P 251 15.9254 0.762896 0.97561
GE.MMRI.BHZ. 2019-10-31T01:15:00.52 10.0 positive automatic P 191 15.8705 -0.191222 0.833333
GE.SAUI.BHZ. 2019-10-31T01:15:00.23 10.0 positive automatic P 158 16.0673 -3.47166 0.43956
MY.SBM.BHZ. 2019-10-31T01:14:33.67 10.0 negative automatic P 252 13.8008 0.647096 0.727273
GE.BNDI.BHZ. 2019-10-31T01:14:12.17 10.0 positive automatic P 158 12.3401 -0.871616 0.615385
GE.FAKI.BHZ. 2019-10-31T01:14:10.47 10.0 positive automatic P 145 12.0428 1.47157 0.816327
GE.BKB.BHZ. 2019-10-31T01:14:01.62 10.0 negative automatic P 227 11.6237 -1.64261 0.43956
GE.SANI.BHZ. 2019-10-31T01:13:25.32 10.0 positive automatic P 176 9.0107 -2.1389 0.740741
GE.LUWI.BHZ. 2019-10-31T01:13:17.82 10.0 negative automatic P 198 8.3715 -0.875326 0.416667
MY.LDM.BHZ. 2019-10-31T01:13:00.62 10.0 negative automatic P 256 7.0022 0.692529 0.97561
GE.TNTI.BHZ. 2019-10-31T01:12:53.97 10.0 positive automatic P 162 6.4951 1.02374 0.615385
IU.DAV.BHZ.00 2019-10-31T01:11:27.30 10.0 positive automatic P 63 0.2946 2.16058 0.987654
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